rsync
SYNOPSIS
rsync [OPTION]... SRC [SRC]... DEST
rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST
rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST
rsync [OPTION]... SRC [SRC]... rsync://[USER@]HOST[:PORT]/DEST
rsync [OPTION]... SRC
rsync [OPTION]... [USER@]HOST:SRC [DEST]
rsync [OPTION]... [USER@]HOST::SRC [DEST]
rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]
DESCRIPTION
rsync is a program that behaves in much the same way that rcp does, but
has many more options and uses the rsync remote-update protocol to
greatly speed up file transfers when the destination file is being
updated.
The rsync remote-update protocol allows rsync to transfer just the dif-
ferences between two sets of files across the network connection, using
an efficient checksum-search algorithm described in the technical
report that accompanies this package.
Some of the additional features of rsync are:
o support for copying links, devices, owners, groups, and permis-
sions
o exclude and exclude-from options similar to GNU tar
o a CVS exclude mode for ignoring the same files that CVS would
ignore
o can use any transparent remote shell, including ssh or rsh
o does not require super-user privileges
o pipelining of file transfers to minimize latency costs
o support for anonymous or authenticated rsync daemons (ideal for
mirroring)
GENERAL
Rsync copies files either to or from a remote host, or locally on the
As a special case, if a single source arg is specified without a desti-
nation, the files are listed in an output format similar to "ls -l".
As expected, if neither the source or destination path specify a remote
host, the copy occurs locally (see also the --list-only option).
SETUP
See the file README for installation instructions.
Once installed, you can use rsync to any machine that you can access
via a remote shell (as well as some that you can access using the rsync
daemon-mode protocol). For remote transfers, a modern rsync uses ssh
for its communications, but it may have been configured to use a dif-
ferent remote shell by default, such as rsh or remsh.
You can also specify any remote shell you like, either by using the -e
command line option, or by setting the RSYNC_RSH environment variable.
Note that rsync must be installed on both the source and destination
machines.
USAGE
You use rsync in the same way you use rcp. You must specify a source
and a destination, one of which may be remote.
Perhaps the best way to explain the syntax is with some examples:
rsync -t *.c foo:src/
This would transfer all files matching the pattern *.c from the current
directory to the directory src on the machine foo. If any of the files
already exist on the remote system then the rsync remote-update proto-
col is used to update the file by sending only the differences. See the
tech report for details.
rsync -avz foo:src/bar /data/tmp
This would recursively transfer all files from the directory src/bar on
the machine foo into the /data/tmp/bar directory on the local machine.
The files are transferred in "archive" mode, which ensures that sym-
bolic links, devices, attributes, permissions, ownerships, etc. are
preserved in the transfer. Additionally, compression will be used to
reduce the size of data portions of the transfer.
rsync -avz foo:src/bar/ /data/tmp
A trailing slash on the source changes this behavior to avoid creating
an additional directory level at the destination. You can think of a
trailing / on a source as meaning "copy the contents of this directory"
as opposed to "copy the directory by name", but in both cases the
You can also use rsync in local-only mode, where both the source and
destination don't have a ':' in the name. In this case it behaves like
an improved copy command.
Finally, you can list all the (listable) modules available from a par-
ticular rsync daemon by leaving off the module name:
rsync somehost.mydomain.com::
See the following section for more details.
ADVANCED USAGE
The syntax for requesting multiple files from a remote host involves
using quoted spaces in the SRC. Some examples:
rsync host::'modname/dir1/file1 modname/dir2/file2' /dest
This would copy file1 and file2 into /dest from an rsync daemon. Each
additional arg must include the same "modname/" prefix as the first
one, and must be preceded by a single space. All other spaces are
assumed to be a part of the filenames.
rsync -av host:'dir1/file1 dir2/file2' /dest
This would copy file1 and file2 into /dest using a remote shell. This
word-splitting is done by the remote shell, so if it doesn't work it
means that the remote shell isn't configured to split its args based on
whitespace (a very rare setting, but not unknown). If you need to
transfer a filename that contains whitespace, you'll need to either
escape the whitespace in a way that the remote shell will understand,
or use wildcards in place of the spaces. Two examples of this are:
rsync -av host:'file\ name\ with\ spaces' /dest
rsync -av host:file?name?with?spaces /dest
This latter example assumes that your shell passes through unmatched
wildcards. If it complains about "no match", put the name in quotes.
CONNECTING TO AN RSYNC DAEMON
It is also possible to use rsync without a remote shell as the trans-
port. In this case you will directly connect to a remote rsync daemon,
typically using TCP port 873. (This obviously requires the daemon to
be running on the remote system, so refer to the STARTING AN RSYNC DAE-
MON TO ACCEPT CONNECTIONS section below for information on that.)
Using rsync in this way is the same as using it with a remote shell
except that:
o you must not specify the --rsh (-e) option.
An example that copies all the files in a remote module named "src":
rsync -av host::src /dest
Some modules on the remote daemon may require authentication. If so,
you will receive a password prompt when you connect. You can avoid the
password prompt by setting the environment variable RSYNC_PASSWORD to
the password you want to use or using the --password-file option. This
may be useful when scripting rsync.
WARNING: On some systems environment variables are visible to all
users. On those systems using --password-file is recommended.
You may establish the connection via a web proxy by setting the envi-
ronment variable RSYNC_PROXY to a hostname:port pair pointing to your
web proxy. Note that your web proxy's configuration must support proxy
connections to port 873.
USING RSYNC-DAEMON FEATURES VIA A REMOTE-SHELL CONNECTION
It is sometimes useful to use various features of an rsync daemon (such
as named modules) without actually allowing any new socket connections
into a system (other than what is already required to allow remote-
shell access). Rsync supports connecting to a host using a remote
shell and then spawning a single-use "daemon" server that expects to
read its config file in the home dir of the remote user. This can be
useful if you want to encrypt a daemon-style transfer's data, but since
the daemon is started up fresh by the remote user, you may not be able
to use features such as chroot or change the uid used by the daemon.
(For another way to encrypt a daemon transfer, consider using ssh to
tunnel a local port to a remote machine and configure a normal rsync
daemon on that remote host to only allow connections from "localhost".)
From the user's perspective, a daemon transfer via a remote-shell con-
nection uses nearly the same command-line syntax as a normal rsync-dae-
mon transfer, with the only exception being that you must explicitly
set the remote shell program on the command-line with the --rsh=COMMAND
option. (Setting the RSYNC_RSH in the environment will not turn on
this functionality.) For example:
rsync -av --rsh=ssh host::module /dest
used to log-in to the "module".
STARTING AN RSYNC DAEMON TO ACCEPT CONNECTIONS
In order to connect to an rsync daemon, the remote system needs to have
a daemon already running (or it needs to have configured something like
inetd to spawn an rsync daemon for incoming connections on a particular
port). For full information on how to start a daemon that will han-
dling incoming socket connections, see the rsyncd.conf(5) man page --
that is the config file for the daemon, and it contains the full
details for how to run the daemon (including stand-alone and inetd con-
figurations).
If you're using one of the remote-shell transports for the transfer,
there is no need to manually start an rsync daemon.
EXAMPLES
Here are some examples of how I use rsync.
To backup my wife's home directory, which consists of large MS Word
files and mail folders, I use a cron job that runs
rsync -Cavz . arvidsjaur:backup
each night over a PPP connection to a duplicate directory on my machine
"arvidsjaur".
To synchronize my samba source trees I use the following Makefile tar-
gets:
get:
rsync -avuzb --exclude '*~' samba:samba/ .
put:
rsync -Cavuzb . samba:samba/
sync: get put
this allows me to sync with a CVS directory at the other end of the
connection. I then do CVS operations on the remote machine, which saves
a lot of time as the remote CVS protocol isn't very efficient.
I mirror a directory between my "old" and "new" ftp sites with the com-
mand:
rsync -az -e ssh --delete ~ftp/pub/samba nimbus:"~ftp/pub/tridge"
This is launched from cron every few hours.
-b, --backup make backups (see --suffix & --backup-dir)
--backup-dir=DIR make backups into hierarchy based in DIR
--suffix=SUFFIX backup suffix (default ~ w/o --backup-dir)
-u, --update skip files that are newer on the receiver
--inplace update destination files in-place
--append append data onto shorter files
-d, --dirs transfer directories without recursing
-l, --links copy symlinks as symlinks
-L, --copy-links transform symlink into referent file/dir
--copy-unsafe-links only "unsafe" symlinks are transformed
--safe-links ignore symlinks that point outside the tree
-k, --copy-dirlinks transform symlink to dir into referent dir
-K, --keep-dirlinks treat symlinked dir on receiver as dir
-H, --hard-links preserve hard links
-p, --perms preserve permissions
-E, --executability preserve executability
-A, --acls preserve ACLs (implies -p) [non-standard]
-X, --xattrs preserve extended attrs (implies -p) [n.s.]
--chmod=CHMOD change destination permissions
-o, --owner preserve owner (super-user only)
-g, --group preserve group
--devices preserve device files (super-user only)
--specials preserve special files
-D same as --devices --specials
-t, --times preserve times
-O, --omit-dir-times omit directories when preserving times
--super receiver attempts super-user activities
-S, --sparse handle sparse files efficiently
-n, --dry-run show what would have been transferred
-W, --whole-file copy files whole (without rsync algorithm)
-x, --one-file-system don't cross filesystem boundaries
-B, --block-size=SIZE force a fixed checksum block-size
-e, --rsh=COMMAND specify the remote shell to use
--rsync-path=PROGRAM specify the rsync to run on remote machine
--existing ignore non-existing files on receiving side
--ignore-existing ignore files that already exist on receiver
--remove-sent-files sent files/symlinks are removed from sender
--del an alias for --delete-during
--delete delete files that don't exist on sender
--delete-before receiver deletes before transfer (default)
--delete-during receiver deletes during xfer, not before
--delete-after receiver deletes after transfer, not before
--delete-excluded also delete excluded files on receiver
--ignore-errors delete even if there are I/O errors
--force force deletion of dirs even if not empty
--max-delete=NUM don't delete more than NUM files
--max-size=SIZE don't transfer any file larger than SIZE
--min-size=SIZE don't transfer any file smaller than SIZE
--partial keep partially transferred files
--partial-dir=DIR put a partially transferred file into DIR
--delay-updates put all updated files into place at end
-m, --prune-empty-dirs prune empty directory chains from file-list
-F same as --filter='dir-merge /.rsync-filter'
repeated: --filter='- .rsync-filter'
--exclude=PATTERN exclude files matching PATTERN
--exclude-from=FILE read exclude patterns from FILE
--include=PATTERN don't exclude files matching PATTERN
--include-from=FILE read include patterns from FILE
--files-from=FILE read list of source-file names from FILE
-0, --from0 all *from/filter files are delimited by 0s
--address=ADDRESS bind address for outgoing socket to daemon
--port=PORT specify double-colon alternate port number
--sockopts=OPTIONS specify custom TCP options
--blocking-io use blocking I/O for the remote shell
--stats give some file-transfer stats
-8, --8-bit-output leave high-bit chars unescaped in output
-h, --human-readable output numbers in a human-readable format
--progress show progress during transfer
-P same as --partial --progress
-i, --itemize-changes output a change-summary for all updates
--log-format=FORMAT output filenames using the specified format
--password-file=FILE read password from FILE
--list-only list the files instead of copying them
--bwlimit=KBPS limit I/O bandwidth; KBytes per second
--write-batch=FILE write a batched update to FILE
--only-write-batch=FILE like --write-batch but w/o updating dest
--read-batch=FILE read a batched update from FILE
--protocol=NUM force an older protocol version to be used
--checksum-seed=NUM set block/file checksum seed (advanced)
-4, --ipv4 prefer IPv4
-6, --ipv6 prefer IPv6
--version print version number
(-h) --help show this help (see below for -h comment)
Rsync can also be run as a daemon, in which case the following options
are accepted:
--daemon run as an rsync daemon
--address=ADDRESS bind to the specified address
--bwlimit=KBPS limit I/O bandwidth; KBytes per second
--config=FILE specify alternate rsyncd.conf file
--no-detach do not detach from the parent
--port=PORT listen on alternate port number
--sockopts=OPTIONS specify custom TCP options
-v, --verbose increase verbosity
-4, --ipv4 prefer IPv4
-6, --ipv6 prefer IPv6
-h, --help show this help (if used after --daemon)
without any other args.
--version
print the rsync version number and exit.
-v, --verbose
This option increases the amount of information you are given
during the transfer. By default, rsync works silently. A single
-v will give you information about what files are being trans-
ferred and a brief summary at the end. Two -v flags will give
you information on what files are being skipped and slightly
more information at the end. More than two -v flags should only
be used if you are debugging rsync.
Note that the names of the transferred files that are output are
done using a default --log-format of "%n%L", which tells you
just the name of the file and, if the item is a link, where it
points. At the single -v level of verbosity, this does not men-
tion when a file gets its attributes changed. If you ask for an
itemized list of changed attributes (either --itemize-changes or
adding "%i" to the --log-format setting), the output (on the
client) increases to mention all items that are changed in any
way. See the --log-format option for more details.
-q, --quiet
This option decreases the amount of information you are given
during the transfer, notably suppressing information messages
from the remote server. This flag is useful when invoking rsync
from cron.
-I, --ignore-times
Normally rsync will skip any files that are already the same
size and have the same modification time-stamp. This option
turns off this "quick check" behavior.
--size-only
Normally rsync will not transfer any files that are already the
same size and have the same modification time-stamp. With the
--size-only option, files will not be transferred if they have
the same size, regardless of timestamp. This is useful when
starting to use rsync after using another mirroring system which
may not preserve timestamps exactly.
--modify-window
When comparing two timestamps, rsync treats the timestamps as
being equal if they differ by no more than the modify-window
order to decide which files need to be updated: files with
either a changed size or a changed checksum are selected for
transfer. Since this whole-file checksumming of all files on
both sides of the connection occurs in addition to the automatic
checksum verifications that occur during a file's transfer, this
option can be quite slow.
Note that rsync always verifies that each transferred file was
correctly reconstructed on the receiving side by checking its
whole-file checksum, but that automatic after-the-transfer veri-
fication has nothing to do with this option's before-the-trans-
fer "Does this file need to be updated?" check.
-a, --archive
This is equivalent to -rlptgoD. It is a quick way of saying you
want recursion and want to preserve almost everything (with -H
being a notable omission). The only exception to the above
equivalence is when --files-from is specified, in which case -r
is not implied.
Note that -a does not preserve hardlinks, because finding multi-
ply-linked files is expensive. You must separately specify -H.
--no-OPTION
You may turn off one or more implied options by prefixing the
option name with "no-". Not all options may be prefixed with a
"no-": only options that are implied by other options (e.g.
--no-D, --no-perms) or have different defaults in various cir-
cumstances (e.g. --no-whole-file, --no-blocking-io, --no-dirs).
You may specify either the short or the long option name after
the "no-" prefix (e.g. --no-R is the same as --no-relative).
For example: if you want to use -a (--archive) but don't want -o
(--owner), instead of converting -a into -rlptgD, you could
specify -a --no-o (or -a --no-owner).
The order of the options is important: if you specify --no-r
-a, the -r option would end up being turned on, the opposite of
-a --no-r. Note also that the side-effects of the --files-from
option are NOT positional, as it affects the default state of
several options and slightly changes the meaning of -a (see the
--files-from option for more details).
-r, --recursive
This tells rsync to copy directories recursively. See also
--dirs (-d).
-R, --relative
remote machine -- the full path name is preserved. To limit the
amount of path information that is sent, you have a couple
options: (1) With a modern rsync on the sending side (beginning
with 2.6.7), you can insert a dot and a slash into the source
path, like this:
rsync -avR /foo/./bar/baz.c remote:/tmp/
That would create /tmp/bar/baz.c on the remote machine. (Note
that the dot must be followed by a slash, so "/foo/." would not
be abbreviated.) (2) For older rsync versions, you would need
to use a chdir to limit the source path. For example, when
pushing files:
(cd /foo; rsync -avR bar/baz.c remote:/tmp/)
(Note that the parens put the two commands into a sub-shell, so
that the "cd" command doesn't remain in effect for future com-
mands.) If you're pulling files, use this idiom (which doesn't
work with an rsync daemon):
rsync -avR --rsync-path="cd /foo; rsync" \
remote:bar/baz.c /tmp/
--no-implied-dirs
This option affects the default behavior of the --relative
option. When it is specified, the attributes of the implied
directories from the source names are not included in the trans-
fer. This means that the corresponding path elements on the
destination system are left unchanged if they exist, and any
missing implied directories are created with default attributes.
This even allows these implied path elements to have big differ-
ences, such as being a symlink to a directory on one side of the
transfer, and a real directory on the other side.
For instance, if a command-line arg or a files-from entry told
rsync to transfer the file "path/foo/file", the directories
"path" and "path/foo" are implied when --relative is used. If
"path/foo" is a symlink to "bar" on the destination system, the
receiving rsync would ordinarily delete "path/foo", recreate it
as a directory, and receive the file into the new directory.
With --no-implied-dirs, the receiving rsync updates
"path/foo/file" using the existing path elements, which means
that the file ends up being created in "path/bar". Another way
to accomplish this link preservation is to use the --keep-
dirlinks option (which will also affect symlinks to directories
in the rest of the transfer).
In a similar but opposite scenario, if the transfer of
"path/foo/file" is requested and "path/foo" is a symlink on the
sending side, running without --no-implied-dirs would cause
the --backup-dir and --suffix options.
Note that if you don't specify --backup-dir, (1) the --omit-dir-
times option will be implied, and (2) if --delete is also in
effect (without --delete-excluded), rsync will add a "protect"
filter-rule for the backup suffix to the end of all your exist-
ing excludes (e.g. -f "P *~"). This will prevent previously
backed-up files from being deleted. Note that if you are sup-
plying your own filter rules, you may need to manually insert
your own exclude/protect rule somewhere higher up in the list so
that it has a high enough priority to be effective (e.g., if
your rules specify a trailing inclusion/exclusion of '*', the
auto-added rule would never be reached).
--backup-dir=DIR
In combination with the --backup option, this tells rsync to
store all backups in the specified directory. This is very use-
ful for incremental backups. You can additionally specify a
backup suffix using the --suffix option (otherwise the files
backed up in the specified directory will keep their original
filenames).
--suffix=SUFFIX
This option allows you to override the default backup suffix
used with the --backup (-b) option. The default suffix is a ~ if
no --backup-dir was specified, otherwise it is an empty string.
-u, --update
This forces rsync to skip any files which exist on the destina-
tion and have a modified time that is newer than the source
file. (If an existing destination file has a modify time equal
to the source file's, it will be updated if the sizes are dif-
ferent.)
In the current implementation of --update, a difference of file
format between the sender and receiver is always considered to
be important enough for an update, no matter what date is on the
objects. In other words, if the source has a directory or a
symlink where the destination has a file, the transfer would
occur regardless of the timestamps. This might change in the
future (feel free to comment on this on the mailing list if you
have an opinion).
--inplace
This causes rsync not to create a new copy of the file and then
move it into place. Instead rsync will overwrite the existing
file, meaning that the rsync algorithm can't accomplish the full
amount of network reduction it might be able to otherwise (since
WARNING: The file's data will be in an inconsistent state during
the transfer (and possibly afterward if the transfer gets inter-
rupted), so you should not use this option to update files that
are in use. Also note that rsync will be unable to update a
file in-place that is not writable by the receiving user.
--append
This causes rsync to update a file by appending data onto the
end of the file, which presumes that the data that already
exists on the receiving side is identical with the start of the
file on the sending side. If that is not true, the file will
fail the checksum test, and the resend will do a normal
--inplace update to correct the mismatched data. Only files on
the receiving side that are shorter than the corresponding file
on the sending side (as well as new files) are sent. Implies
--inplace, but does not conflict with --sparse (though the
--sparse option will be auto-disabled if a resend of the
already-existing data is required).
-d, --dirs
Tell the sending side to include any directories that are
encountered. Unlike --recursive, a directory's contents are not
copied unless the directory name specified is "." or ends with a
trailing slash (e.g. ".", "dir/.", "dir/", etc.). Without this
option or the --recursive option, rsync will skip all directo-
ries it encounters (and output a message to that effect for each
one). If you specify both --dirs and --recursive, --recursive
takes precedence.
-l, --links
When symlinks are encountered, recreate the symlink on the des-
tination.
-L, --copy-links
When symlinks are encountered, the item that they point to (the
referent) is copied, rather than the symlink. In older versions
of rsync, this option also had the side-effect of telling the
receiving side to follow symlinks, such as symlinks to directo-
ries. In a modern rsync such as this one, you'll need to spec-
ify --keep-dirlinks (-K) to get this extra behavior. The only
exception is when sending files to an rsync that is too old to
understand -K -- in that case, the -L option will still have the
side-effect of -K on that older receiving rsync.
--copy-unsafe-links
This tells rsync to copy the referent of symbolic links that
point outside the copied tree. Absolute symlinks are also
directory as though it were a real directory. This is useful if
you don't want symlinks to non-directories to be affected, as
they would be using --copy-links.
Without this option, if the sending side has replaced a direc-
tory with a symlink to a directory, the receiving side will
delete anything that is in the way of the new symlink, including
a directory hierarchy (as long as --force or --delete is in
effect).
See also --keep-dirlinks for an analogous option for the receiv-
ing side.
-K, --keep-dirlinks
This option causes the receiving side to treat a symlink to a
directory as though it were a real directory, but only if it
matches a real directory from the sender. Without this option,
the receiver's symlink would be deleted and replaced with a real
directory.
For example, suppose you transfer a directory "foo" that con-
tains a file "file", but "foo" is a symlink to directory "bar"
on the receiver. Without --keep-dirlinks, the receiver deletes
symlink "foo", recreates it as a directory, and receives the
file into the new directory. With --keep-dirlinks, the receiver
keeps the symlink and "file" ends up in "bar".
See also --copy-dirlinks for an analogous option for the sending
side.
-H, --hard-links
This tells rsync to look for hard-linked files in the transfer
and link together the corresponding files on the receiving side.
Without this option, hard-linked files in the transfer are
treated as though they were separate files.
Note that rsync can only detect hard links if both parts of the
link are in the list of files being sent.
-p, --perms
This option causes the receiving rsync to set the destination
permissions to be the same as the source permissions. (See also
the --chmod option for a way to modify what rsync considers to
be the source permissions.)
When this option is off, permissions are set as follows:
o Existing files (including updated files) retain their
ties, such as cp(1) and tar(1).
In summary: to give destination files (both old and new) the
source permissions, use --perms. To give new files the destina-
tion-default permissions (while leaving existing files
unchanged), make sure that the --perms option is off and use
--chmod=ugo=rwX (which ensures that all non-masked bits get
enabled). If you'd care to make this latter behavior easier to
type, you could define a popt alias for it, such as putting this
line in the file ~/.popt (this defines the -s option, and
includes --no-g to use the default group of the destination
dir):
rsync alias -s --no-p --no-g --chmod=ugo=rwX
You could then use this new option in a command such as this
one:
rsync -asv src/ dest/
(Caveat: make sure that -a does not follow -s, or it will re-
enable the "--no-*" options.)
The preservation of the destination's setgid bit on newly-cre-
ated directories when --perms is off was added in rsync 2.6.7.
Older rsync versions erroneously preserved the three special
permission bits for newly-created files when --perms was off,
while overriding the destination's setgid bit setting on a
newly-created directory. Default ACL observance was added to
the ACL patch for rsync 2.6.7, so older (or non-ACL-enabled)
rsyncs use the umask even if default ACLs are present. (Keep in
mind that it is the version of the receiving rsync that affects
these behaviors.)
-E, --executability
This option causes rsync to preserve the executability (or non-
executability) of regular files when --perms is not enabled. A
regular file is considered to be executable if at least one 'x'
is turned on in its permissions. When an existing destination
file's executability differs from that of the corresponding
source file, rsync modifies the destination file's permissions
as follows:
o To make a file non-executable, rsync turns off all its
'x' permissions.
o To make a file executable, rsync turns on each 'x' per-
mission that has a corresponding 'r' permission enabled.
If --perms is enabled, this option is ignored.
-X, --xattrs
This option causes rsync to update the remote extended
attributes to be the same as the local ones. This will work
only if the remote machine's rsync supports this option also.
This is a non-standard option.
--chmod
This option tells rsync to apply one or more comma-separated
"chmod" strings to the permission of the files in the transfer.
The resulting value is treated as though it was the permissions
that the sending side supplied for the file, which means that
this option can seem to have no effect on existing files if
--perms is not enabled.
In addition to the normal parsing rules specified in the
chmod(1) manpage, you can specify an item that should only apply
to a directory by prefixing it with a 'D', or specify an item
that should only apply to a file by prefixing it with a 'F'.
For example:
--chmod=Dg+s,ug+w,Fo-w,+X
It is also legal to specify multiple --chmod options, as each
additional option is just appended to the list of changes to
make.
See the --perms and --executability options for how the result-
ing permission value can be applied to the files in the trans-
fer.
-o, --owner
This option causes rsync to set the owner of the destination
file to be the same as the source file, but only if the receiv-
ing rsync is being run as the super-user (see also the --super
option to force rsync to attempt super-user activities). With-
out this option, the owner is set to the invoking user on the
receiving side.
The preservation of ownership will associate matching names by
default, but may fall back to using the ID number in some cir-
cumstances (see also the --numeric-ids option for a full discus-
sion).
-g, --group
This option causes rsync to set the group of the destination
file to be the same as the source file. If the receiving pro-
gram is not running as the super-user (or if --no-super was
specified), only groups that the invoking user on the receiving
side is a member of will be preserved. Without this option, the
--specials
This option causes rsync to transfer special files such as named
sockets and fifos.
-D The -D option is equivalent to --devices --specials.
-t, --times
This tells rsync to transfer modification times along with the
files and update them on the remote system. Note that if this
option is not used, the optimization that excludes files that
have not been modified cannot be effective; in other words, a
missing -t or -a will cause the next transfer to behave as if it
used -I, causing all files to be updated (though the rsync algo-
rithm will make the update fairly efficient if the files haven't
actually changed, you're much better off using -t).
-O, --omit-dir-times
This tells rsync to omit directories when it is preserving modi-
fication times (see --times). If NFS is sharing the directories
on the receiving side, it is a good idea to use -O. This option
is inferred if you use --backup without --backup-dir.
--super
This tells the receiving side to attempt super-user activities
even if the receiving rsync wasn't run by the super-user. These
activities include: preserving users via the --owner option,
preserving all groups (not just the current user's groups) via
the --groups option, and copying devices via the --devices
option. This is useful for systems that allow such activities
without being the super-user, and also for ensuring that you
will get errors if the receiving side isn't being running as the
super-user. To turn off super-user activities, the super-user
can use --no-super.
-S, --sparse
Try to handle sparse files efficiently so they take up less
space on the destination. Conflicts with --inplace because it's
not possible to overwrite data in a sparse fashion.
NOTE: Don't use this option when the destination is a Solaris
"tmpfs" filesystem. It doesn't seem to handle seeks over null
regions correctly and ends up corrupting the files.
-n, --dry-run
-x, --one-file-system
This tells rsync to avoid crossing a filesystem boundary when
recursing. This does not limit the user's ability to specify
items to copy from multiple filesystems, just rsync's recursion
through the hierarchy of each directory that the user specified,
and also the analogous recursion on the receiving side during
deletion. Also keep in mind that rsync treats a "bind" mount to
the same device as being on the same filesystem.
If this option is repeated, rsync omits all mount-point directo-
ries from the copy. Otherwise, it includes an empty directory
at each mount-point it encounters (using the attributes of the
mounted directory because those of the underlying mount-point
directory are inaccessible).
If rsync has been told to collapse symlinks (via --copy-links or
--copy-unsafe-links), a symlink to a directory on another device
is treated like a mount-point. Symlinks to non-directories are
unaffected by this option.
--existing, --ignore-non-existing
This tells rsync to skip updating files that do not exist yet on
the destination. If this option is combined with the --ignore-
existing option, no files will be updated (which can be useful
if all you want to do is to delete missing files).
--ignore-existing
This tells rsync to skip updating files that already exist on
the destination. See also --ignore-non-existing.
--remove-sent-files
This tells rsync to remove from the sending side the files
and/or symlinks that are newly created or whose content is
updated on the receiving side. Directories and devices are not
removed, nor are files/symlinks whose attributes are merely
changed.
--delete
This tells rsync to delete extraneous files from the receiving
side (ones that aren't on the sending side), but only for the
directories that are being synchronized. You must have asked
rsync to send the whole directory (e.g. "dir" or "dir/") without
using a wildcard for the directory's contents (e.g. "dir/*")
since the wildcard is expanded by the shell and rsync thus gets
a request to transfer individual files, not the files' parent
directory. Files that are excluded from transfer are also
excluded from being deleted unless you use the --delete-excluded
option or mark the rules as only matching on the sending side
This is to prevent temporary filesystem failures (such as NFS
errors) on the sending side causing a massive deletion of files
on the destination. You can override this with the --ignore-
errors option.
The --delete option may be combined with one of the --delete-
WHEN options without conflict, as well as --delete-excluded.
However, if none of the --delete-WHEN options are specified,
rsync will currently choose the --delete-before algorithm. A
future version may change this to choose the --delete-during
algorithm. See also --delete-after.
--delete-before
Request that the file-deletions on the receiving side be done
before the transfer starts. This is the default if --delete or
--delete-excluded is specified without one of the --delete-WHEN
options. See --delete (which is implied) for more details on
file-deletion.
Deleting before the transfer is helpful if the filesystem is
tight for space and removing extraneous files would help to make
the transfer possible. However, it does introduce a delay
before the start of the transfer, and this delay might cause the
transfer to timeout (if --timeout was specified).
--delete-during, --del
Request that the file-deletions on the receiving side be done
incrementally as the transfer happens. This is a faster method
than choosing the before- or after-transfer algorithm, but it is
only supported beginning with rsync version 2.6.4. See --delete
(which is implied) for more details on file-deletion.
--delete-after
Request that the file-deletions on the receiving side be done
after the transfer has completed. This is useful if you are
sending new per-directory merge files as a part of the transfer
and you want their exclusions to take effect for the delete
phase of the current transfer. See --delete (which is implied)
for more details on file-deletion.
--delete-excluded
In addition to deleting the files on the receiving side that are
not on the sending side, this tells rsync to also delete any
files on the receiving side that are excluded (see --exclude).
See the FILTER RULES section for a way to make individual exclu-
sions behave this way on the receiver, and for a way to protect
files from --delete-excluded. See --delete (which is implied)
for more details on file-deletion.
unless the --recursive option was also enabled.
--max-delete=NUM
This tells rsync not to delete more than NUM files or directo-
ries (NUM must be non-zero). This is useful when mirroring very
large trees to prevent disasters.
--max-size=SIZE
This tells rsync to avoid transferring any file that is larger
than the specified SIZE. The SIZE value can be suffixed with a
string to indicate a size multiplier, and may be a fractional
value (e.g. "--max-size=1.5m").
The suffixes are as follows: "K" (or "KiB") is a kibibyte
(1024), "M" (or "MiB") is a mebibyte (1024*1024), and "G" (or
"GiB") is a gibibyte (1024*1024*1024). If you want the multi-
plier to be 1000 instead of 1024, use "KB", "MB", or "GB".
(Note: lower-case is also accepted for all values.) Finally, if
the suffix ends in either "+1" or "-1", the value will be offset
by one byte in the indicated direction.
Examples: --max-size=1.5mb-1 is 1499999 bytes, and --max-
size=2g+1 is 2147483649 bytes.
--min-size=SIZE
This tells rsync to avoid transferring any file that is smaller
than the specified SIZE, which can help in not transferring
small, junk files. See the --max-size option for a description
of SIZE.
-B, --block-size=BLOCKSIZE
This forces the block size used in the rsync algorithm to a
fixed value. It is normally selected based on the size of each
file being updated. See the technical report for details.
-e, --rsh=COMMAND
This option allows you to choose an alternative remote shell
program to use for communication between the local and remote
copies of rsync. Typically, rsync is configured to use ssh by
default, but you may prefer to use rsh on a local network.
If this option is used with [user@]host::module/path, then the
remote shell COMMAND will be used to run an rsync daemon on the
remote host, and all data will be transmitted through that
remote shell connection, rather than through a direct socket
connection to a running rsync daemon on the remote host. See
the section "USING RSYNC-DAEMON FEATURES VIA A REMOTE-SHELL CON-
-e 'ssh -o "ProxyCommand nohup ssh firewall nc -w1 %h %p"'
(Note that ssh users can alternately customize site-specific
connect options in their .ssh/config file.)
You can also choose the remote shell program using the RSYNC_RSH
environment variable, which accepts the same range of values as
-e.
See also the --blocking-io option which is affected by this
option.
--rsync-path=PROGRAM
Use this to specify what program is to be run on the remote
machine to start-up rsync. Often used when rsync is not in the
default remote-shell's path (e.g. --rsync-
path=/usr/local/bin/rsync). Note that PROGRAM is run with the
help of a shell, so it can be any program, script, or command
sequence you'd care to run, so long as it does not corrupt the
standard-in & standard-out that rsync is using to communicate.
One tricky example is to set a different default directory on
the remote machine for use with the --relative option. For
instance:
rsync -avR --rsync-path="cd /a/b && rsync" hst:c/d /e/
-C, --cvs-exclude
This is a useful shorthand for excluding a broad range of files
that you often don't want to transfer between systems. It uses
the same algorithm that CVS uses to determine if a file should
be ignored.
The exclude list is initialized to:
RCS SCCS CVS CVS.adm RCSLOG cvslog.* tags TAGS
.make.state .nse_depinfo *~ #* .#* ,* _$* *$ *.old *.bak
*.BAK *.orig *.rej .del-* *.a *.olb *.o *.obj *.so *.exe
*.Z *.elc *.ln core .svn/
then files listed in a $HOME/.cvsignore are added to the list
and any files listed in the CVSIGNORE environment variable (all
cvsignore names are delimited by whitespace).
Finally, any file is ignored if it is in the same directory as a
.cvsignore file and matches one of the patterns listed therein.
Unlike rsync's filter/exclude files, these patterns are split on
whitespace. See the cvs(1) manual for more information.
If you're combining -C with your own --filter rules, you should
This option allows you to add rules to selectively exclude cer-
tain files from the list of files to be transferred. This is
most useful in combination with a recursive transfer.
You may use as many --filter options on the command line as you
like to build up the list of files to exclude.
See the FILTER RULES section for detailed information on this
option.
-F The -F option is a shorthand for adding two --filter rules to
your command. The first time it is used is a shorthand for this
rule:
--filter='dir-merge /.rsync-filter'
This tells rsync to look for per-directory .rsync-filter files
that have been sprinkled through the hierarchy and use their
rules to filter the files in the transfer. If -F is repeated,
it is a shorthand for this rule:
--filter='exclude .rsync-filter'
This filters out the .rsync-filter files themselves from the
transfer.
See the FILTER RULES section for detailed information on how
these options work.
--exclude=PATTERN
This option is a simplified form of the --filter option that
defaults to an exclude rule and does not allow the full rule-
parsing syntax of normal filter rules.
See the FILTER RULES section for detailed information on this
option.
--exclude-from=FILE
This option is related to the --exclude option, but it specifies
a FILE that contains exclude patterns (one per line). Blank
lines in the file and lines starting with ';' or '#' are
ignored. If FILE is -, the list will be read from standard
input.
--include=PATTERN
This option is a simplified form of the --filter option that
defaults to an include rule and does not allow the full rule-
parsing syntax of normal filter rules.
Using this option allows you to specify the exact list of files
to transfer (as read from the specified FILE or - for standard
input). It also tweaks the default behavior of rsync to make
transferring just the specified files and directories easier:
o The --relative (-R) option is implied, which preserves
the path information that is specified for each item in
the file (use --no-relative or --no-R if you want to turn
that off).
o The --dirs (-d) option is implied, which will create
directories specified in the list on the destination
rather than noisily skipping them (use --no-dirs or --no-
d if you want to turn that off).
o The --archive (-a) option's behavior does not imply
--recursive (-r), so specify it explicitly, if you want
it.
o These side-effects change the default state of rsync, so
the position of the --files-from option on the command-
line has no bearing on how other options are parsed (e.g.
-a works the same before or after --files-from, as does
--no-R and all other options).
The file names that are read from the FILE are all relative to
the source dir -- any leading slashes are removed and no ".."
references are allowed to go higher than the source dir. For
example, take this command:
rsync -a --files-from=/tmp/foo /usr remote:/backup
If /tmp/foo contains the string "bin" (or even "/bin"), the
/usr/bin directory will be created as /backup/bin on the remote
host. If it contains "bin/" (note the trailing slash), the
immediate contents of the directory would also be sent (without
needing to be explicitly mentioned in the file -- this began in
version 2.6.4). In both cases, if the -r option was enabled,
that dir's entire hierarchy would also be transferred (keep in
mind that -r needs to be specified explicitly with --files-from,
since it is not implied by -a). Also note that the effect of
the (enabled by default) --relative option is to duplicate only
the path info that is read from the file -- it does not force
the duplication of the source-spec path (/usr in this case).
In addition, the --files-from file can be read from the remote
host instead of the local host if you specify a "host:" in front
of the file (the host must match one end of the transfer). As a
short-cut, you can specify just a prefix of ":" to mean "use the
remote end of the transfer". For example:
-T, --temp-dir=DIR
This option instructs rsync to use DIR as a scratch directory
when creating temporary copies of the files transferred on the
receiving side. The default behavior is to create each tempo-
rary file in the same directory as the associated destination
file.
This option is most often used when the receiving disk partition
does not have enough free space to hold a copy of the largest
file in the transfer. In this case (i.e. when the scratch
directory in on a different disk partition), rsync will not be
able to rename each received temporary file over the top of the
associated destination file, but instead must copy it into
place. Rsync does this by copying the file over the top of the
destination file, which means that the destination file will
contain truncated data during this copy. If this were not done
this way (even if the destination file were first removed, the
data locally copied to a temporary file in the destination
directory, and then renamed into place) it would be possible for
the old file to continue taking up disk space (if someone had it
open), and thus there might not be enough room to fit the new
version on the disk at the same time.
If you are using this option for reasons other than a shortage
of disk space, you may wish to combine it with the --delay-
updates option, which will ensure that all copied files get put
into subdirectories in the destination hierarchy, awaiting the
end of the transfer. If you don't have enough room to duplicate
all the arriving files on the destination partition, another way
to tell rsync that you aren't overly concerned about disk space
is to use the --partial-dir option with a relative path; because
this tells rsync that it is OK to stash off a copy of a single
file in a subdir in the destination hierarchy, rsync will use
the partial-dir as a staging area to bring over the copied file,
and then rename it into place from there. (Specifying a --par-
tial-dir with an absolute path does not have this side-effect.)
-y, --fuzzy
This option tells rsync that it should look for a basis file for
any destination file that is missing. The current algorithm
looks in the same directory as the destination file for either a
file that has an identical size and modified-time, or a simi-
larly-named file. If found, rsync uses the fuzzy basis file to
try to speed up the transfer.
Note that the use of the --delete option might get rid of any
potential fuzzy-match files, so either use --delete-after or
specify some filename exclusions if you need to prevent this.
one of the DIRs will be selected to try to speed up the trans-
fer.
If DIR is a relative path, it is relative to the destination
directory. See also --copy-dest and --link-dest.
--copy-dest=DIR
This option behaves like --compare-dest, but rsync will also
copy unchanged files found in DIR to the destination directory
using a local copy. This is useful for doing transfers to a new
destination while leaving existing files intact, and then doing
a flash-cutover when all files have been successfully trans-
ferred.
Multiple --copy-dest directories may be provided, which will
cause rsync to search the list in the order specified for an
unchanged file. If a match is not found, a basis file from one
of the DIRs will be selected to try to speed up the transfer.
If DIR is a relative path, it is relative to the destination
directory. See also --compare-dest and --link-dest.
--link-dest=DIR
This option behaves like --copy-dest, but unchanged files are
hard linked from DIR to the destination directory. The files
must be identical in all preserved attributes (e.g. permissions,
possibly ownership) in order for the files to be linked
together. An example:
rsync -av --link-dest=$PWD/prior_dir host:src_dir/ new_dir/
Beginning in version 2.6.4, multiple --link-dest directories may
be provided, which will cause rsync to search the list in the
order specified for an exact match. If a match is found that
differs only in attributes, a local copy is made and the
attributes updated. If a match is not found, a basis file from
one of the DIRs will be selected to try to speed up the trans-
fer.
If DIR is a relative path, it is relative to the destination
directory. See also --compare-dest and --copy-dest.
Note that rsync versions prior to 2.6.1 had a bug that could
prevent --link-dest from working properly for a non-super-user
when -o was specified (or implied by -a). You can work-around
this bug by avoiding the -o option when sending to an old rsync.
-z, --compress
With this option, rsync compresses the file data as it is sent
press option is implied.
--numeric-ids
With this option rsync will transfer numeric group and user IDs
rather than using user and group names and mapping them at both
ends.
By default rsync will use the username and groupname to deter-
mine what ownership to give files. The special uid 0 and the
special group 0 are never mapped via user/group names even if
the --numeric-ids option is not specified.
If a user or group has no name on the source system or it has no
match on the destination system, then the numeric ID from the
source system is used instead. See also the comments on the
"use chroot" setting in the rsyncd.conf manpage for information
on how the chroot setting affects rsync's ability to look up the
names of the users and groups and what you can do about it.
--timeout=TIMEOUT
This option allows you to set a maximum I/O timeout in seconds.
If no data is transferred for the specified time then rsync will
exit. The default is 0, which means no timeout.
--address
By default rsync will bind to the wildcard address when connect-
ing to an rsync daemon. The --address option allows you to
specify a specific IP address (or hostname) to bind to. See
also this option in the --daemon mode section.
--port=PORT
This specifies an alternate TCP port number to use rather than
the default of 873. This is only needed if you are using the
double-colon (::) syntax to connect with an rsync daemon (since
the URL syntax has a way to specify the port as a part of the
URL). See also this option in the --daemon mode section.
--sockopts
This option can provide endless fun for people who like to tune
their systems to the utmost degree. You can set all sorts of
socket options which may make transfers faster (or slower!).
Read the man page for the setsockopt() system call for details
on some of the options you may be able to set. By default no
special socket options are set. This only affects direct socket
connections to a remote rsync daemon. This option also exists
in the --daemon mode section.
receiving rsync is at least version 2.6.7 (you can use -vv with
older versions of rsync, but that also turns on the output of
other verbose messages).
The "%i" escape has a cryptic output that is 9 letters long.
The general format is like the string YXcstpogz, where Y is
replaced by the type of update being done, X is replaced by the
file-type, and the other letters represent attributes that may
be output if they are being modified.
The update types that replace the Y are as follows:
o A < means that a file is being transferred to the remote
host (sent).
o A > means that a file is being transferred to the local
host (received).
o A c means that a local change/creation is occurring for
the item (such as the creation of a directory or the
changing of a symlink, etc.).
o A h means that the item is a hard link to another item
(requires --hard-links).
o A . means that the item is not being updated (though it
might have attributes that are being modified).
The file-types that replace the X are: f for a file, a d for a
directory, an L for a symlink, a D for a device, and a S for a
special file (e.g. named sockets and fifos).
The other letters in the string above are the actual letters
that will be output if the associated attribute for the item is
being updated or a "." for no change. Three exceptions to this
are: (1) a newly created item replaces each letter with a "+",
(2) an identical item replaces the dots with spaces, and (3) an
unknown attribute replaces each letter with a "?" (this can hap-
pen when talking to an older rsync).
The attribute that is associated with each letter is as follows:
o A c means the checksum of the file is different and will
be updated by the file transfer (requires --checksum).
o A s means the size of the file is different and will be
updated by the file transfer.
o A t means the modification time is different and is being
updated to the sender's value (requires --times). An
set the group).
o The z slot is reserved for future use.
One other output is possible: when deleting files, the "%i"
will output the string "*deleting" for each item that is being
removed (assuming that you are talking to a recent enough rsync
that it logs deletions instead of outputting them as a verbose
message).
--log-format=FORMAT
This allows you to specify exactly what the rsync client outputs
to the user on a per-file basis. The format is a text string
containing embedded single-character escape sequences prefixed
with a percent (%) character. For a list of the possible escape
characters, see the "log format" setting in the rsyncd.conf
manpage. (Note that this option does not affect what a daemon
logs to its logfile.)
Specifying this option will mention each file, dir, etc. that
gets updated in a significant way (a transferred file, a recre-
ated symlink/device, or a touched directory) unless the itemize-
changes escape (%i) is included in the string, in which case the
logging of names increases to mention any item that is changed
in any way (as long as the receiving side is at least 2.6.4).
See the --itemize-changes option for a description of the output
of "%i".
The --verbose option implies a format of "%n%L", but you can use
--log-format without --verbose if you like, or you can override
the format of its per-file output using this option.
Rsync will output the log-format string prior to a file's trans-
fer unless one of the transfer-statistic escapes is requested,
in which case the logging is done at the end of the file's
transfer. When this late logging is in effect and --progress is
also specified, rsync will also output the name of the file
being transferred prior to its progress information (followed,
of course, by the log-format output).
--stats
This tells rsync to print a verbose set of statistics on the
file transfer, allowing you to tell how effective the rsync
algorithm is for your data.
The current statistics are as follows:
o Number of files is the count of all "files" (in the
generic sense), which includes directories, symlinks,
etc.
updated files.
o Matched data is how much data the receiver got locally
when recreating the updated files.
o File list size is how big the file-list data was when the
sender sent it to the receiver. This is smaller than the
in-memory size for the file list due to some compressing
of duplicated data when rsync sends the list.
o File list generation time is the number of seconds that
the sender spent creating the file list. This requires a
modern rsync on the sending side for this to be present.
o File list transfer time is the number of seconds that the
sender spent sending the file list to the receiver.
o Total bytes sent is the count of all the bytes that rsync
sent from the client side to the server side.
o Total bytes received is the count of all non-message
bytes that rsync received by the client side from the
server side. "Non-message" bytes means that we don't
count the bytes for a verbose message that the server
sent to us, which makes the stats more consistent.
-8, --8-bit-output
This tells rsync to leave all high-bit characters unescaped in
the output instead of trying to test them to see if they're
valid in the current locale and escaping the invalid ones. All
control characters (but never tabs) are always escaped, regard-
less of this option's setting.
The escape idiom that started in 2.6.7 is to output a literal
backslash (\) and a hash (#), followed by exactly 3 octal dig-
its. For example, a newline would output as "\#012". A literal
backslash that is in a filename is not escaped unless it is fol-
lowed by a hash and 3 digits (0-9).
-h, --human-readable
Output numbers in a more human-readable format. This makes big
numbers output using larger units, with a K, M, or G suffix. If
this option was specified once, these units are K (1000), M
(1000*1000), and G (1000*1000*1000); if the option is repeated,
the units are powers of 1024 instead of 1000.
--partial
By default, rsync will delete any partially transferred file if
the transfer is interrupted. In some circumstances it is more
tial-dir file that is found for a file that is being updated
will simply be removed (since rsync is sending files without
using the incremental rsync algorithm).
Rsync will create the DIR if it is missing (just the last dir --
not the whole path). This makes it easy to use a relative path
(such as "--partial-dir=.rsync-partial") to have rsync create
the partial-directory in the destination file's directory when
needed, and then remove it again when the partial file is
deleted.
If the partial-dir value is not an absolute path, rsync will add
an exclude rule at the end of all your existing excludes. This
will prevent the sending of any partial-dir files that may exist
on the sending side, and will also prevent the untimely deletion
of partial-dir items on the receiving side. An example: the
above --partial-dir option would add the equivalent of
"--exclude=.rsync-partial/" at the end of any other filter
rules.
If you are supplying your own exclude rules, you may need to add
your own exclude/hide/protect rule for the partial-dir because
(1) the auto-added rule may be ineffective at the end of your
other rules, or (2) you may wish to override rsync's exclude
choice. For instance, if you want to make rsync clean-up any
left-over partial-dirs that may be lying around, you should
specify --delete-after and add a "risk" filter rule, e.g. -f 'R
.rsync-partial/'. (Avoid using --delete-before or --delete-dur-
ing unless you don't need rsync to use any of the left-over par-
tial-dir data during the current run.)
IMPORTANT: the --partial-dir should not be writable by other
users or it is a security risk. E.g. AVOID "/tmp".
You can also set the partial-dir value the RSYNC_PARTIAL_DIR
environment variable. Setting this in the environment does not
force --partial to be enabled, but rather it affects where par-
tial files go when --partial is specified. For instance,
instead of using --partial-dir=.rsync-tmp along with --progress,
you could set RSYNC_PARTIAL_DIR=.rsync-tmp in your environment
and then just use the -P option to turn on the use of the
.rsync-tmp dir for partial transfers. The only times that the
--partial option does not look for this environment value are
(1) when --inplace was specified (since --inplace conflicts with
--partial-dir), and (2) when --delay-updates was specified (see
below).
For the purposes of the daemon-config's "refuse options" set-
ting, --partial-dir does not imply --partial. This is so that a
refusal of the --partial option can be used to disallow the
overwriting of destination files with a partial transfer, while
still allowing the safer idiom provided by --partial-dir.
--append.
This option uses more memory on the receiving side (one bit per
file transferred) and also requires enough free disk space on
the receiving side to hold an additional copy of all the updated
files. Note also that you should not use an absolute path to
--partial-dir unless (1) there is no chance of any of the files
in the transfer having the same name (since all the updated
files will be put into a single directory if the path is abso-
lute) and (2) there are no mount points in the hierarchy (since
the delayed updates will fail if they can't be renamed into
place).
See also the "atomic-rsync" perl script in the "support" subdir
for an update algorithm that is even more atomic (it uses
--link-dest and a parallel hierarchy of files).
-m, --prune-empty-dirs
This option tells the receiving rsync to get rid of empty direc-
tories from the file-list, including nested directories that
have no non-directory children. This is useful for avoiding the
creation of a bunch of useless directories when the sending
rsync is recursively scanning a hierarchy of files using
include/exclude/filter rules.
Because the file-list is actually being pruned, this option also
affects what directories get deleted when a delete is active.
However, keep in mind that excluded files and directories can
prevent existing items from being deleted (because an exclude
hides source files and protects destination files).
You can prevent the pruning of certain empty directories from
the file-list by using a global "protect" filter. For instance,
this option would ensure that the directory "emptydir" was kept
in the file-list:
--filter 'protect emptydir/'
Here's an example that copies all .pdf files in a hierarchy,
only creating the necessary destination directories to hold the
.pdf files, and ensures that any superfluous files and directo-
ries in the destination are removed (note the hide filter of
non-directories being used instead of an exclude):
rsync -avm --del --include='*.pdf' -f 'hide,! */' src/ dest
If you didn't want to remove superfluous destination files, the
more time-honored options of "--include='*/' --exclude='*'"
would work fine in place of the hide-filter (if that is more
natural to you).
This tells you the current file size, the percentage of the
transfer that is complete, the current calculated file-comple-
tion rate (including both data over the wire and data being
matched locally), and the estimated time remaining in this
transfer.
After a file is complete, the data looks like this:
1238099 100% 146.38kB/s 0:00:08 (5, 57.1% of 396)
This tells you the final file size, that it's 100% complete, the
final transfer rate for the file, the amount of elapsed time it
took to transfer the file, and the addition of a total-transfer
summary in parentheses. These additional numbers tell you how
many files have been updated, and what percent of the total num-
ber of files has been scanned.
-P The -P option is equivalent to --partial --progress. Its pur-
pose is to make it much easier to specify these two options for
a long transfer that may be interrupted.
--password-file
This option allows you to provide a password in a file for
accessing a remote rsync daemon. Note that this option is only
useful when accessing an rsync daemon using the built in trans-
port, not when using a remote shell as the transport. The file
must not be world readable. It should contain just the password
as a single line.
--list-only
This option will cause the source files to be listed instead of
transferred. This option is inferred if there is a single
source arg and no destination specified, so its main uses are:
(1) to turn a copy command that includes a destination arg into
a file-listing command, (2) to be able to specify more than one
local source arg (note: be sure to include the destination), or
(3) to avoid the automatically added "-r --exclude='/*/*'"
options that rsync usually uses as a compatibility kluge when
generating a non-recursive listing. Caution: keep in mind that
a source arg with a wild-card is expanded by the shell into mul-
tiple args, so it is never safe to try to list such an arg with-
out using this option. For example:
--write-batch=FILE
Record a file that can later be applied to another identical
destination with --read-batch. See the "BATCH MODE" section for
details, and also the --only-write-batch option.
--only-write-batch=FILE
Works like --write-batch, except that no updates are made on the
destination system when creating the batch. This lets you
transport the changes to the destination system via some other
means and then apply the changes via --read-batch.
Note that you can feel free to write the batch directly to some
portable media: if this media fills to capacity before the end
of the transfer, you can just apply that partial transfer to the
destination and repeat the whole process to get the rest of the
changes (as long as you don't mind a partially updated destina-
tion system while the multi-update cycle is happening).
Also note that you only save bandwidth when pushing changes to a
remote system because this allows the batched data to be
diverted from the sender into the batch file without having to
flow over the wire to the receiver (when pulling, the sender is
remote, and thus can't write the batch).
--read-batch=FILE
Apply all of the changes stored in FILE, a file previously gen-
erated by --write-batch. If FILE is -, the batch data will be
read from standard input. See the "BATCH MODE" section for
details.
--protocol=NUM
Force an older protocol version to be used. This is useful for
creating a batch file that is compatible with an older version
of rsync. For instance, if rsync 2.6.4 is being used with the
--write-batch option, but rsync 2.6.3 is what will be used to
run the --read-batch option, you should use "--protocol=28" when
creating the batch file to force the older protocol version to
be used in the batch file (assuming you can't upgrade the rsync
on the reading system).
-4, --ipv4 or -6, --ipv6
Tells rsync to prefer IPv4/IPv6 when creating sockets. This
only affects sockets that rsync has direct control over, such as
the outgoing socket when directly contacting an rsync daemon.
See also these options in the --daemon mode section.
The options allowed when starting an rsync daemon are as follows:
--daemon
This tells rsync that it is to run as a daemon. The daemon you
start running may be accessed using an rsync client using the
host::module or rsync://host/module/ syntax.
If standard input is a socket then rsync will assume that it is
being run via inetd, otherwise it will detach from the current
terminal and become a background daemon. The daemon will read
the config file (rsyncd.conf) on each connect made by a client
and respond to requests accordingly. See the rsyncd.conf(5) man
page for more details.
--address
By default rsync will bind to the wildcard address when run as a
daemon with the --daemon option. The --address option allows
you to specify a specific IP address (or hostname) to bind to.
This makes virtual hosting possible in conjunction with the
--config option. See also the "address" global option in the
rsyncd.conf manpage.
--bwlimit=KBPS
This option allows you to specify a maximum transfer rate in
kilobytes per second for the data the daemon sends. The client
can still specify a smaller --bwlimit value, but their requested
value will be rounded down if they try to exceed it. See the
client version of this option (above) for some extra details.
--config=FILE
This specifies an alternate config file than the default. This
is only relevant when --daemon is specified. The default is
/etc/rsyncd.conf unless the daemon is running over a remote
shell program and the remote user is not the super-user; in that
case the default is rsyncd.conf in the current directory (typi-
cally $HOME).
--no-detach
When running as a daemon, this option instructs rsync to not
detach itself and become a background process. This option is
required when running as a service on Cygwin, and may also be
useful when rsync is supervised by a program such as daemontools
or AIX's System Resource Controller. --no-detach is also recom-
mended when rsync is run under a debugger. This option has no
effect if rsync is run from inetd or sshd.
daemon's verbosity level will be controlled by the options that
the client used and the "max verbosity" setting in the module's
config section.
-4, --ipv4 or -6, --ipv6
Tells rsync to prefer IPv4/IPv6 when creating the incoming sock-
ets that the rsync daemon will use to listen for connections.
One of these options may be required in older versions of Linux
to work around an IPv6 bug in the kernel (if you see an "address
already in use" error when nothing else is using the port, try
specifying --ipv6 or --ipv4 when starting the daemon).
-h, --help
When specified after --daemon, print a short help page describ-
ing the options available for starting an rsync daemon.
FILTER RULES
The filter rules allow for flexible selection of which files to trans-
fer (include) and which files to skip (exclude). The rules either
directly specify include/exclude patterns or they specify a way to
acquire more include/exclude patterns (e.g. to read them from a file).
As the list of files/directories to transfer is built, rsync checks
each name to be transferred against the list of include/exclude pat-
terns in turn, and the first matching pattern is acted on: if it is an
exclude pattern, then that file is skipped; if it is an include pattern
then that filename is not skipped; if no matching pattern is found,
then the filename is not skipped.
Rsync builds an ordered list of filter rules as specified on the com-
mand-line. Filter rules have the following syntax:
RULE [PATTERN_OR_FILENAME]
RULE,MODIFIERS [PATTERN_OR_FILENAME]
You have your choice of using either short or long RULE names, as
described below. If you use a short-named rule, the ',' separating the
RULE from the MODIFIERS is optional. The PATTERN or FILENAME that fol-
lows (when present) must come after either a single space or an under-
score (_). Here are the available rule prefixes:
exclude, - specifies an exclude pattern.
include, + specifies an include pattern.
merge, . specifies a merge-file to read for more rules.
dir-merge, : specifies a per-directory merge-file.
hide, H specifies a pattern for hiding files from the transfer.
show, S files that match the pattern are not hidden.
protect, P specifies a pattern for protecting files from dele-
tion.
or long rule name at the start of the rule.
Note also that the --filter, --include, and --exclude options take one
rule/pattern each. To add multiple ones, you can repeat the options on
the command-line, use the merge-file syntax of the --filter option, or
the --include-from/--exclude-from options.
INCLUDE/EXCLUDE PATTERN RULES
You can include and exclude files by specifying patterns using the "+",
"-", etc. filter rules (as introduced in the FILTER RULES section
above). The include/exclude rules each specify a pattern that is
matched against the names of the files that are going to be trans-
ferred. These patterns can take several forms:
o if the pattern starts with a / then it is anchored to a particu-
lar spot in the hierarchy of files, otherwise it is matched
against the end of the pathname. This is similar to a leading ^
in regular expressions. Thus "/foo" would match a file named
"foo" at either the "root of the transfer" (for a global rule)
or in the merge-file's directory (for a per-directory rule). An
unqualified "foo" would match any file or directory named "foo"
anywhere in the tree because the algorithm is applied recur-
sively from the top down; it behaves as if each path component
gets a turn at being the end of the file name. Even the unan-
chored "sub/foo" would match at any point in the hierarchy where
a "foo" was found within a directory named "sub". See the sec-
tion on ANCHORING INCLUDE/EXCLUDE PATTERNS for a full discussion
of how to specify a pattern that matches at the root of the
transfer.
o if the pattern ends with a / then it will only match a direc-
tory, not a file, link, or device.
o rsync chooses between doing a simple string match and wildcard
matching by checking if the pattern contains one of these three
wildcard characters: '*', '?', and '[' .
o a '*' matches any non-empty path component (it stops at
slashes).
o use '**' to match anything, including slashes.
o a '?' matches any character except a slash (/).
o a '[' introduces a character class, such as [a-z] or
[[:alpha:]].
o in a wildcard pattern, a backslash can be used to escape a wild-
card character, but it is matched literally when no wildcards
are present.
Note that, when using the --recursive (-r) option (which is implied by
-a), every subcomponent of every path is visited from the top down, so
include/exclude patterns get applied recursively to each subcomponent's
full name (e.g. to include "/foo/bar/baz" the subcomponents "/foo" and
"/foo/bar" must not be excluded). The exclude patterns actually short-
circuit the directory traversal stage when rsync finds the files to
send. If a pattern excludes a particular parent directory, it can ren-
der a deeper include pattern ineffectual because rsync did not descend
through that excluded section of the hierarchy. This is particularly
important when using a trailing '*' rule. For instance, this won't
work:
+ /some/path/this-file-will-not-be-found
+ /file-is-included
- *
This fails because the parent directory "some" is excluded by the '*'
rule, so rsync never visits any of the files in the "some" or
"some/path" directories. One solution is to ask for all directories in
the hierarchy to be included by using a single rule: "+ */" (put it
somewhere before the "- *" rule), and perhaps use the --prune-empty-
dirs option. Another solution is to add specific include rules for all
the parent dirs that need to be visited. For instance, this set of
rules works fine:
+ /some/
+ /some/path/
+ /some/path/this-file-is-found
+ /file-also-included
- *
Here are some examples of exclude/include matching:
o "- *.o" would exclude all filenames matching *.o
o "- /foo" would exclude a file (or directory) named foo in the
transfer-root directory
o "- foo/" would exclude any directory named foo
o "- /foo/*/bar" would exclude any file named bar which is at two
levels below a directory named foo in the transfer-root direc-
tory
o "- /foo/**/bar" would exclude any file named bar two or more
levels below a directory named foo in the transfer-root direc-
tory
o The combination of "+ */", "+ *.c", and "- *" would include all
directories and C source files but nothing else (see also the
--prune-empty-dirs option)
rule. For per-directory merge files, rsync will scan every directory
that it traverses for the named file, merging its contents when the
file exists into the current list of inherited rules. These per-direc-
tory rule files must be created on the sending side because it is the
sending side that is being scanned for the available files to transfer.
These rule files may also need to be transferred to the receiving side
if you want them to affect what files don't get deleted (see PER-DIREC-
TORY RULES AND DELETE below).
Some examples:
merge /etc/rsync/default.rules
. /etc/rsync/default.rules
dir-merge .per-dir-filter
dir-merge,n- .non-inherited-per-dir-excludes
:n- .non-inherited-per-dir-excludes
The following modifiers are accepted after a merge or dir-merge rule:
o A - specifies that the file should consist of only exclude pat-
terns, with no other rule-parsing except for in-file comments.
o A + specifies that the file should consist of only include pat-
terns, with no other rule-parsing except for in-file comments.
o A C is a way to specify that the file should be read in a CVS-
compatible manner. This turns on 'n', 'w', and '-', but also
allows the list-clearing token (!) to be specified. If no file-
name is provided, ".cvsignore" is assumed.
o A e will exclude the merge-file name from the transfer; e.g.
"dir-merge,e .rules" is like "dir-merge .rules" and "- .rules".
o An n specifies that the rules are not inherited by subdirecto-
ries.
o A w specifies that the rules are word-split on whitespace
instead of the normal line-splitting. This also turns off com-
ments. Note: the space that separates the prefix from the rule
is treated specially, so "- foo + bar" is parsed as two rules
(assuming that prefix-parsing wasn't also disabled).
o You may also specify any of the modifiers for the "+" or "-"
rules (below) in order to have the rules that are read in from
the file default to having that modifier set. For instance,
"merge,-/ .excl" would treat the contents of .excl as absolute-
path excludes, while "dir-merge,s .filt" and ":sC" would each
make all their per-directory rules apply only on the sending
side.
The following modifiers are accepted after a "+" or "-":
should be inserted as excludes in place of the "-C". No arg
should follow.
o An s is used to indicate that the rule applies to the sending
side. When a rule affects the sending side, it prevents files
from being transferred. The default is for a rule to affect
both sides unless --delete-excluded was specified, in which case
default rules become sender-side only. See also the hide (H)
and show (S) rules, which are an alternate way to specify send-
ing-side includes/excludes.
o An r is used to indicate that the rule applies to the receiving
side. When a rule affects the receiving side, it prevents files
from being deleted. See the s modifier for more info. See also
the protect (P) and risk (R) rules, which are an alternate way
to specify receiver-side includes/excludes.
Per-directory rules are inherited in all subdirectories of the direc-
tory where the merge-file was found unless the 'n' modifier was used.
Each subdirectory's rules are prefixed to the inherited per-directory
rules from its parents, which gives the newest rules a higher priority
than the inherited rules. The entire set of dir-merge rules are
grouped together in the spot where the merge-file was specified, so it
is possible to override dir-merge rules via a rule that got specified
earlier in the list of global rules. When the list-clearing rule ("!")
is read from a per-directory file, it only clears the inherited rules
for the current merge file.
Another way to prevent a single rule from a dir-merge file from being
inherited is to anchor it with a leading slash. Anchored rules in a
per-directory merge-file are relative to the merge-file's directory, so
a pattern "/foo" would only match the file "foo" in the directory where
the dir-merge filter file was found.
Here's an example filter file which you'd specify via --filter=".
file":
merge /home/user/.global-filter
- *.gz
dir-merge .rules
+ *.[ch]
- *.o
This will merge the contents of the /home/user/.global-filter file at
the start of the list and also turns the ".rules" filename into a per-
directory filter file. All rules read in prior to the start of the
directory scan follow the global anchoring rules (i.e. a leading slash
matches at the root of the transfer).
If a per-directory merge-file is specified with a path that is a parent
directory of the first transfer directory, rsync will scan all the par-
ent dirs from that starting point to the transfer directory for the
rsync -av --filter=': ../../.rsync-filter' /src/path/ /dest/dir
rsync -av --filter=': .rsync-filter' /src/path/ /dest/dir
The first two commands above will look for ".rsync-filter" in "/" and
"/src" before the normal scan begins looking for the file in
"/src/path" and its subdirectories. The last command avoids the par-
ent-dir scan and only looks for the ".rsync-filter" files in each
directory that is a part of the transfer.
If you want to include the contents of a ".cvsignore" in your patterns,
you should use the rule ":C", which creates a dir-merge of the .cvsig-
nore file, but parsed in a CVS-compatible manner. You can use this to
affect where the --cvs-exclude (-C) option's inclusion of the per-
directory .cvsignore file gets placed into your rules by putting the
":C" wherever you like in your filter rules. Without this, rsync would
add the dir-merge rule for the .cvsignore file at the end of all your
other rules (giving it a lower priority than your command-line rules).
For example:
cat <<EOT | rsync -avC --filter='. -' a/ b
+ foo.o
:C
- *.old
EOT
rsync -avC --include=foo.o -f :C --exclude='*.old' a/ b
Both of the above rsync commands are identical. Each one will merge
all the per-directory .cvsignore rules in the middle of the list rather
than at the end. This allows their dir-specific rules to supersede the
rules that follow the :C instead of being subservient to all your
rules. To affect the other CVS exclude rules (i.e. the default list of
exclusions, the contents of $HOME/.cvsignore, and the value of $CVSIG-
NORE) you should omit the -C command-line option and instead insert a
"-C" rule into your filter rules; e.g. "--filter=-C".
LIST-CLEARING FILTER RULE
You can clear the current include/exclude list by using the "!" filter
rule (as introduced in the FILTER RULES section above). The "current"
list is either the global list of rules (if the rule is encountered
while parsing the filter options) or a set of per-directory rules
(which are inherited in their own sub-list, so a subdirectory can use
this to clear out the parent's rules).
ANCHORING INCLUDE/EXCLUDE PATTERNS
As mentioned earlier, global include/exclude patterns are anchored at
the "root of the transfer" (as opposed to per-directory patterns, which
are anchored at the merge-file's directory). If you think of the
transfer as a subtree of names that are being sent from sender to
receiver, the transfer-root is where the tree starts to be duplicated
in the destination directory. This root governs where patterns that
+/- pattern: /you/bar/baz
Target file: /dest/me/foo/bar
Target file: /dest/you/bar/baz
Example cmd: rsync -a /home/me/ /home/you/ /dest
+/- pattern: /foo/bar (note missing "me")
+/- pattern: /bar/baz (note missing "you")
Target file: /dest/foo/bar
Target file: /dest/bar/baz
Example cmd: rsync -a --relative /home/me/ /home/you /dest
+/- pattern: /home/me/foo/bar (note full path)
+/- pattern: /home/you/bar/baz (ditto)
Target file: /dest/home/me/foo/bar
Target file: /dest/home/you/bar/baz
Example cmd: cd /home; rsync -a --relative me/foo you/ /dest
+/- pattern: /me/foo/bar (starts at specified path)
+/- pattern: /you/bar/baz (ditto)
Target file: /dest/me/foo/bar
Target file: /dest/you/bar/baz
The easiest way to see what name you should filter is to just look at
the output when using --verbose and put a / in front of the name (use
the --dry-run option if you're not yet ready to copy any files).
PER-DIRECTORY RULES AND DELETE
Without a delete option, per-directory rules are only relevant on the
sending side, so you can feel free to exclude the merge files them-
selves without affecting the transfer. To make this easy, the 'e' mod-
ifier adds this exclude for you, as seen in these two equivalent com-
mands:
rsync -av --filter=': .excl' --exclude=.excl host:src/dir /dest
rsync -av --filter=':e .excl' host:src/dir /dest
However, if you want to do a delete on the receiving side AND you want
some files to be excluded from being deleted, you'll need to be sure
that the receiving side knows what files to exclude. The easiest way
is to include the per-directory merge files in the transfer and use
--delete-after, because this ensures that the receiving side gets all
the same exclude rules as the sending side before it tries to delete
anything:
rsync -avF --delete-after host:src/dir /dest
However, if the merge files are not a part of the transfer, you'll need
to either specify some global exclude rules (i.e. specified on the com-
mand line), or you'll need to maintain your own per-directory merge
files on the receiving side. An example of the first is this (assume
that the remote .rules files exclude themselves):
files from the transfer, but we want to use our own .rsync-filter files
to control what gets deleted on the receiving side. To do this we must
specifically exclude the per-directory merge files (so that they don't
get deleted) and then put rules into the local files to control what
else should not get deleted. Like one of these commands:
rsync -av --filter=':e /.rsync-filter' --delete \
host:src/dir /dest
rsync -avFF --delete host:src/dir /dest
BATCH MODE
Batch mode can be used to apply the same set of updates to many identi-
cal systems. Suppose one has a tree which is replicated on a number of
hosts. Now suppose some changes have been made to this source tree and
those changes need to be propagated to the other hosts. In order to do
this using batch mode, rsync is run with the write-batch option to
apply the changes made to the source tree to one of the destination
trees. The write-batch option causes the rsync client to store in a
"batch file" all the information needed to repeat this operation
against other, identical destination trees.
To apply the recorded changes to another destination tree, run rsync
with the read-batch option, specifying the name of the same batch file,
and the destination tree. Rsync updates the destination tree using the
information stored in the batch file.
For convenience, one additional file is creating when the write-batch
option is used. This file's name is created by appending ".sh" to the
batch filename. The .sh file contains a command-line suitable for
updating a destination tree using that batch file. It can be executed
using a Bourne (or Bourne-like) shell, optionally passing in an alter-
nate destination tree pathname which is then used instead of the origi-
nal path. This is useful when the destination tree path differs from
the original destination tree path.
Generating the batch file once saves having to perform the file status,
checksum, and data block generation more than once when updating multi-
ple destination trees. Multicast transport protocols can be used to
transfer the batch update files in parallel to many hosts at once,
instead of sending the same data to every host individually.
Examples:
$ rsync --write-batch=foo -a host:/source/dir/ /adest/dir/
$ scp foo* remote:
$ ssh remote ./foo.sh /bdest/dir/
desired.
o The first example uses the created "foo.sh" file to get the
right rsync options when running the read-batch command on the
remote host.
o The second example reads the batch data via standard input so
that the batch file doesn't need to be copied to the remote
machine first. This example avoids the foo.sh script because it
needed to use a modified --read-batch option, but you could edit
the script file if you wished to make use of it (just be sure
that no other option is trying to use standard input, such as
the "--exclude-from=-" option).
Caveats:
The read-batch option expects the destination tree that it is updating
to be identical to the destination tree that was used to create the
batch update fileset. When a difference between the destination trees
is encountered the update might be discarded with a warning (if the
file appears to be up-to-date already) or the file-update may be
attempted and then, if the file fails to verify, the update discarded
with an error. This means that it should be safe to re-run a read-
batch operation if the command got interrupted. If you wish to force
the batched-update to always be attempted regardless of the file's size
and date, use the -I option (when reading the batch). If an error
occurs, the destination tree will probably be in a partially updated
state. In that case, rsync can be used in its regular (non-batch) mode
of operation to fix up the destination tree.
The rsync version used on all destinations must be at least as new as
the one used to generate the batch file. Rsync will die with an error
if the protocol version in the batch file is too new for the batch-
reading rsync to handle. See also the --protocol option for a way to
have the creating rsync generate a batch file that an older rsync can
understand. (Note that batch files changed format in version 2.6.3, so
mixing versions older than that with newer versions will not work.)
When reading a batch file, rsync will force the value of certain
options to match the data in the batch file if you didn't set them to
the same as the batch-writing command. Other options can (and should)
be changed. For instance --write-batch changes to --read-batch,
--files-from is dropped, and the --filter/--include/--exclude options
are not needed unless one of the --delete options is specified.
The code that creates the BATCH.sh file transforms any fil-
ter/include/exclude options into a single list that is appended as a
"here" document to the shell script file. An advanced user can use
this to modify the exclude list if a change in what gets deleted by
--delete is desired. A normal user can ignore this detail and just use
the shell script as an easy way to run the appropriate --read-batch
command for the batched data.
If --copy-links is specified, then symlinks are "collapsed" by copying
their referent, rather than the symlink.
rsync also distinguishes "safe" and "unsafe" symbolic links. An exam-
ple where this might be used is a web site mirror that wishes ensure
the rsync module they copy does not include symbolic links to
/etc/passwd in the public section of the site. Using --copy-unsafe-
links will cause any links to be copied as the file they point to on
the destination. Using --safe-links will cause unsafe links to be
omitted altogether. (Note that you must specify --links for --safe-
links to have any effect.)
Symbolic links are considered unsafe if they are absolute symlinks
(start with /), empty, or if they contain enough ".." components to
ascend from the directory being copied.
Here's a summary of how the symlink options are interpreted. The list
is in order of precedence, so if your combination of options isn't men-
tioned, use the first line that is a complete subset of your options:
--copy-links
Turn all symlinks into normal files (leaving no symlinks for any
other options to affect).
--links --copy-unsafe-links
Turn all unsafe symlinks into files and duplicate all safe sym-
links.
--copy-unsafe-links
Turn all unsafe symlinks into files, noisily skip all safe sym-
links.
--links --safe-links
Duplicate safe symlinks and skip unsafe ones.
--links
Duplicate all symlinks.
DIAGNOSTICS
rsync occasionally produces error messages that may seem a little cryp-
tic. The one that seems to cause the most confusion is "protocol ver-
sion mismatch -- is your shell clean?".
This message is usually caused by your startup scripts or remote shell
facility producing unwanted garbage on the stream that rsync is using
ing the -vv option. At this level of verbosity rsync will show why
each individual file is included or excluded.
EXIT VALUES
0 Success
1 Syntax or usage error
2 Protocol incompatibility
3 Errors selecting input/output files, dirs
4 Requested action not supported: an attempt was made to manipu-
late 64-bit files on a platform that cannot support them; or an
option was specified that is supported by the client and not by
the server.
5 Error starting client-server protocol
6 Daemon unable to append to log-file
10 Error in socket I/O
11 Error in file I/O
12 Error in rsync protocol data stream
13 Errors with program diagnostics
14 Error in IPC code
20 Received SIGUSR1 or SIGINT
21 Some error returned by waitpid()
22 Error allocating core memory buffers
23 Partial transfer due to error
24 Partial transfer due to vanished source files
25 The --max-delete limit stopped deletions
30 Timeout in data send/receive
ENVIRONMENT VARIABLES
CVSIGNORE
The CVSIGNORE environment variable supplements any ignore pat-
terns in .cvsignore files. See the --cvs-exclude option for more
details.
run authenticated rsync connections to an rsync daemon without
user intervention. Note that this does not supply a password to
a shell transport such as ssh.
USER or LOGNAME
The USER or LOGNAME environment variables are used to determine
the default username sent to an rsync daemon. If neither is
set, the username defaults to "nobody".
HOME The HOME environment variable is used to find the user's default
.cvsignore file.
FILES
/etc/rsyncd.conf or rsyncd.conf
SEE ALSO
rsyncd.conf(5)
BUGS
times are transferred as *nix time_t values
When transferring to FAT filesystems rsync may re-sync unmodified
files. See the comments on the --modify-window option.
file permissions, devices, etc. are transferred as native numerical
values
see also the comments on the --delete option
Please report bugs! See the website at http://rsync.samba.org/
VERSION
This man page is current for version 2.6.8 of rsync.
CREDITS
rsync is distributed under the GNU public license. See the file COPY-
ING for details.
A WEB site is available at http://rsync.samba.org/. The site includes
an FAQ-O-Matic which may cover questions unanswered by this manual
page.
The primary ftp site for rsync is ftp://rsync.samba.org/pub/rsync.
We would be delighted to hear from you if you like this program.
This program uses the excellent zlib compression library written by
Many people have later contributed to it.
Mailing lists for support and development are available at
http://lists.samba.org
22 Apr 2006 rsync(1)
