1 mailto(rsync-bugs@samba.anu.edu.au)
2 manpage(rsync)(1)(13 May 1998)()()
3 manpagename(rsync)(faster, flexible replacement for rcp)
6 rsync [options] [user@]host:path path
8 rsync [options] path [user@]host:path
10 rsync [options] path path
12 rsync [options] [user@]host::path path
14 rsync [options] path [user@]host::path
18 rsync is a program that behaves in much the same way that rcp does,
19 but has many more options and uses the rsync remote-update protocol to
20 greatly speedup file transfers when the destination file already
23 The rsync remote-update protocol allows rsync to transfer just the
24 differences between two sets of files across the network link, using
25 an efficient checksum-search algorithm described in the technical
26 report that accompanies this package.
28 Some of the additional features of rsync are:
31 it() support for copying links, devices, owners, groups and permissions
32 it() exclude and exclude-from options similar to GNU tar
33 it() a CVS exclude mode for ignoring the same files that CVS would ignore
34 it() can use any transparent remote shell, including rsh or ssh
35 it() does not require root privileges
36 it() pipelining of file transfers to minimize latency costs
37 it() support for anonymous or authenticated rsync servers (ideal for
41 manpagesection(GENERAL)
43 There are five different ways of using rsync. They are:
46 it() for copying local files. This is invoked when neither
47 source nor destination path contains a : separator
49 it() for copying from the local machine to a remote machine using
50 a remote shell program as the transport (such as rsh or
51 ssh). This is invoked when the destination path contains a
54 it() for copying from a remote machine to the local machine
55 using a remote shell program. This is invoked when the local path
56 contains a : separator.
58 it() for copying from a remote rsync server to the local
59 machine. This is invoked when the source path contains a ::
62 it() for copying from the local machine to a remote rsync
63 server. This is invoked when the destination path contains a ::
67 Note that in all cases at least one of the source and destination
72 See the file README for installation instructions.
74 Once installed you can use rsync to any machine that you can use rsh
75 to. rsync uses rsh for its communications, unless both the source and
76 destination are local.
78 You can also specify a alternative to rsh, by either using the -e
79 command line option, or by setting the RSYNC_RSH environment variable.
81 One common substitute is to use ssh, which offers a high degree of
84 Note that rsync must be installed on both the source and destination
89 You use rsync in the same way you use rcp. You must specify a source
90 and a destination, one of which may be remote.
92 Perhaps the best way to explain the syntax is some examples:
94 quote(rsync *.c foo:src/)
96 this would transfer all files matching the pattern *.c from the
97 current directory to the directory src on the machine foo. If any of
98 the files already exist on the remote system then the rsync
99 remote-update protocol is used to update the file by sending only the
100 differences. See the tech report for details.
102 quote(rsync -avz foo:src/bar /data/tmp)
104 recursively transfer all files from the directory src/bar on the
105 machine foo into the /data/tmp/bar directory on the local machine. The
106 files are transferred in "archive" mode, which ensures that symbolic
107 links, devices, attributes, permissions, ownerships etc are preserved
108 in the transfer. Additionally compression will be used to reduce the
109 size of data portions of the transfer.
111 quote(rsync -avz foo:src/bar/ /data/tmp)
113 With a trailing slash on the source this behavior changes to transfer
114 all files from the directory src/bar on the machine foo into the
115 /data/tmp/. With a trailing / on a source name it means "copy the
116 contents of this directory". Without a trailing slash it means "copy
117 the directory". This difference becomes particularly important when
118 using the --delete option.
120 You can also use rsync in local-only mode, where both the source and
121 destination don't have a ':' in the name. In this case it behaves like
122 an improved copy command.
125 manpagesection(CONNECTING TO AN RSYNC SERVER)
127 It is also possible to use rsync without using rsh or ssh as the
128 transport. In this case you will connect to a remote rsync server
129 running on TCP port 873.
131 Using rsync in this was is the same as using it with rsh or ssh except
135 it() you use a double colon :: instead of a single colon to
136 separate the hostname from the path.
138 it() the remote server may print a message of the day when you
141 it() if you specify no path name on the remote server then the
142 list of accessible paths on the server will be shown.
145 Some paths on the remote server may require authentication. If so then
146 you will receive a password prompt when you connect. You can avoid the
147 password prompt by setting the environment variable RSYNC_PASSWORD to
148 the password you want to use. This may be useful when scripting rsync.
150 manpagesection(RUNNING AN RSYNC SERVER)
152 An rsync server is configured using a config file which by default is
153 called /etc/rsyncd.conf. Please see the rsyncd.conf(5) man page for more
156 manpagesection(EXAMPLES)
158 Here are some examples of how I use rsync.
160 To backup my wife's home directory, which consists of large MS word
161 files and mail folders I use a cron job that runs
163 quote(rsync -Cavz . arvidsjaur:backup)
165 each night over a PPP link to a duplicate directory on my machine
168 To synchronize my samba source trees I use the following Makefile
172 rsync -avuzb --exclude '*~' samba:samba/ .
175 rsync -Cavuzb . samba:samba/
179 this allows me to sync with a CVS directory at the other end of the
180 link. I then do cvs operations on the remote machine, which saves a
181 lot of time as the remote cvs protocol isn't very efficient.
183 I mirror a directory between my "old" and "new" ftp sites with the
186 quote(rsync -az -e ssh --delete ~ftp/pub/samba/ nimbus:"~ftp/pub/tridge/samba")
188 this is launched from cron every few hours.
190 manpagesection(OPTIONS SUMMARY)
192 Here is a short summary of the options avalable in rsync. Please refer
193 to the detailed description below for a complete description.
196 Usage: rsync [OPTION]... SRC [USER@]HOST:DEST
197 or rsync [OPTION]... [USER@]HOST:SRC DEST
198 or rsync [OPTION]... SRC DEST
199 or rsync [OPTION]... [USER@]HOST::SRC DEST
200 or rsync [OPTION]... SRC [USER@]HOST::DEST
203 -v, --verbose increase verbosity
204 -c, --checksum always checksum
205 -a, --archive archive mode
206 -r, --recursive recurse into directories
207 -R, --relative use relative path names
208 -b, --backup make backups (default ~ extension)
209 -u, --update update only (don't overwrite newer files)
210 -l, --links preserve soft links
211 -L, --copy-links treat soft links like regular files
212 --safe-links ignore links outside the destination tree
213 -H, --hard-links preserve hard links
214 -p, --perms preserve permissions
215 -o, --owner preserve owner (root only)
216 -g, --group preserve group
217 -D, --devices preserve devices (root only)
218 -t, --times preserve times
219 -S, --sparse handle sparse files efficiently
220 -n, --dry-run show what would have been transferred
221 -W, --whole-file copy whole files, no incremental checks
222 -x, --one-file-system don't cross filesystem boundaries
223 -B, --block-size=SIZE checksum blocking size
224 -e, --rsh=COMMAND specify rsh replacement
225 --rsync-path=PATH specify path to rsync on the remote machine
226 -C, --cvs-exclude auto ignore files in the same way CVS does
227 --delete delete files that don't exist on the sending side
228 --partial keep partially transferred files
229 --force force deletion of directories even if not empty
230 --numeric-ids don't map uid/gid values by user/group name
231 --timeout=TIME set IO timeout in seconds
232 -I, --ignore-times don't exclude files that match length and time
233 -T --temp-dir=DIR create temporary files in directory DIR
234 -z, --compress compress file data
235 --exclude=PATTERN exclude file FILE
236 --exclude-from=PATTERN exclude files listed in FILE
237 --include=PATTERN don't exclude file FILE
238 --include-from=PATTERN don't exclude files listed in FILE
239 --suffix=SUFFIX override backup suffix
240 --version print version number
241 --daemon run as a rsync daemon
242 --config=FILE specify alternate rsyncd.conf file
243 --port=PORT specify alternate rsyncd port number
244 --stats give some file transfer stats
245 --progress show progress during transfer
246 -h, --help show this help screen
251 rsync uses the GNU long options package. Many of the command line
252 options have two variants, one short and one long. These are shown
253 below separated by commas. Some options only have a long variant.
256 dit(bf(-h, --help)) Print a short help page describing the options
259 dit(bf(--version)) print the rsync version number and exit
261 dit(bf(-v, --verbose)) This option increases the amount of information you
262 are given during the transfer. By default rsync works silently. A
263 single -v will give you information about what files are being
264 transferred and a brief summary at the end. Two -v flags will give you
265 information on what files are being skipped and slightly more
266 information at the end. More than two -v flags should only be used if
267 you are debugging rsync
269 dit(bf(-I, --ignore-times)) Normally rsync will skip any files that are
270 already the same length and have the same time-stamp. This option turns
273 dit(bf(-c, --checksum)) This forces the sender to checksum all files using
274 a 128-bit MD4 checksum before transfer. The checksum is then
275 explicitly checked on the receiver and any files of the same name
276 which already exist and have the same checksum and size on the
277 receiver are skipped. This option can be quite slow.
279 dit(bf(-a, --archive)) This is equivalent to -rlptDg. It is a quick way
280 of saying I want recursion and want to preserve everything.
282 Note: if the user launching rsync is root then the -o option (preserve
283 uid) is also implied.
285 dit(bf(-r, --recursive)) This tells rsync to copy directories recursively
287 dit(bf(-R, --relative)) Use relative paths. This means that the full path
288 names specified on the command line are sent to the server rather than
289 just the last parts of the filenames. This is particularly useful when
290 you want to sent several different directories at the same time. For
291 example if you used the command
293 verb(rsync foo/bar/foo.c remote:/tmp/)
295 then this would create a file called foo.c in /tmp/ on the remote
296 machine. If instead you used
298 verb(rsync -R foo/bar/foo.c remote:/tmp/)
300 then a file called /tmp/foo/bar/foo.c would be created on the remote
301 machine. The full path name is preserved.
303 dit(bf(-b, --backup)) With this option preexisting destination files are
304 renamed with a ~ extension as each file is transferred. You can
305 control the backup suffix using the --suffix option.
307 dit(bf(-u, --update)) This forces rsync to skip any files for which the
308 destination file already exists and has a date later than the source
311 dit(bf(-l, --links)) This tells rsync to recreate symbolic links on the
312 remote system to be the same as the local system. Without this
313 option all symbolic links are skipped.
315 dit(bf(-L, --copy-links)) This tells rsync to treat symbolic links just
318 dit(bf(-H, --hard-links)) This tells rsync to recreate hard links on
319 the remote system to be the same as the local system. Without this
320 option hard links are treated like regular files.
322 Note that rsync can only detect hard links if both parts of the link
323 are in the list of files being sent.
325 This option can be quite slow, so only use it if you need it.
327 dit(bf(-W, --whole-file)) With this option the incremental rsync algorithm
328 is not used and the whole file is sent as-is instead. This may be
329 useful when using rsync with a local machine.
331 dit(bf(--partial)) By default rsync will delete any partially
332 transferred file if the transfer is interrupted. In some circumstances
333 it is more desirable to keep partially transferred files. Using the
334 --partial option tells rsync to keep the partial file which should
335 make a subsequent transfer of the rest of the file much faster.
337 dit(bf(-p, --perms)) This option causes rsync to update the remote
338 permissions to be the same as the local permissions.
340 dit(bf(-o, --owner)) This option causes rsync to update the remote owner
341 of the file to be the same as the local owner. This is only available
344 dit(bf(-g, --group)) This option causes rsync to update the remote group
345 of the file to be the same as the local group.
347 dit(bf(-D, --devices)) This option causes rsync to transfer character and
348 block device information to the remote system to recreate these
349 devices. This option is only available to the super-user.
351 dit(bf(-t, --times)) This tells rsync to transfer modification times along
352 with the files and update them on the remote system
354 dit(bf(-n, --dry-run)) This tells rsync to not do any file transfers,
355 instead it will just report the actions it would have taken.
357 dit(bf(-S, --sparse)) Try to handle sparse files efficiently so they take
358 up less space on the destination.
360 dit(bf(-x, --one-file-system)) This tells rsync not to cross filesystem
361 boundaries when recursing. This is useful for transferring the
362 contents of only one filesystem.
364 dit(bf(--delete)) This tells rsync to delete any files on the receiving
365 side that aren't on the sending side. This option can be dangerous if
368 It is a very good idea to run first using the dry run option (-n) to
369 see what files would be deleted to make sure important files aren't
372 rsync 1.6.4 changed the behavior of --delete to make it less
373 dangerous. rsync now only scans directories on the receiving side
374 that are explicitly transferred from the sending side. Only files in
375 these directories are deleted.
377 Still, it is probably easy to get burnt with this option. The moral
378 of the story is to use the -n option until you get used to the
379 behavior of --delete.
381 NOTE: It also may delete files on the destination if the sending side
382 can't open them or stat them. This is a bug that hopefully will be
383 fixed in a future release.
385 dit(bf(--force)) This options tells rsync to delete directories even if
386 they are not empty. This applies to both the --delete option and to
387 cases where rsync tries to copy a normal file but the destination
388 contains a directory of the same name. Normally rsync will refuse to
389 do a recursive directory deletion in such cases, by using --force
390 the recursive deletion will be done.
392 Use this option with caution!
394 dit(bf(-B , --block_size BLOCKSIZE)) This controls the block size used in
395 the rsync algorithm. See the technical report for details.
397 dit(bf(-e, --rsh COMMAND)) This option allows you to choose an alternative
398 remote shell program to use for communication between the local and
399 remote copies of rsync. By default rsync will use rsh, but you may
400 like to instead use ssh because of its high security.
402 You can also choose the remote shell program using the RSYNC_RSH
403 environment variable.
405 dit(bf(--rsync-path PATH)) Use this to specify the path to the copy of
406 rsync on the remote machine. Useful when its not in your path.
408 dit(bf(--exclude pattern)) This option allows you to selectively exclude
409 certain files from the list of files to be transferred. This is most
410 useful in combination with a recursive transfer.
412 You may use as many --exclude options on the command line as you like
413 to build up the list of files to exclude.
415 See the section of exclude patterns for information on the syntax of
418 dit(bf(--exclude-from FILE)) This option is similar to the --exclude
419 option, but instead it adds all filenames listed in the file FILE to
422 dit(bf(--include pattern)) This option tells rsync to not exclude the
423 specified pattern of filenames. This is useful as it allows you to
424 build up quite complex exclude/include rules.
426 See the section of exclude patterns for information on the syntax of
429 dit(bf(--include-from FILE)) This specifies a list of include patterns
432 dit(bf(-C, --cvs-exclude)) This is a useful shorthand for excluding a
433 broad range of files that you often don't want to transfer between
434 systems. It uses the same algorithm that CVS uses to determine if
435 a file should be ignored.
437 The exclude list is initialized to:
439 quote(RCS SCCS CVS CVS.adm RCSLOG cvslog.* tags TAGS .make.state
440 .nse_depinfo *~ #* .#* ,* *.old *.bak *.BAK *.orig *.rej .del-*
441 *.a *.o *.obj *.so *.Z *.elc *.ln core)
443 then files listed in a $HOME/.cvsignore are added to the list and any
444 files listed in the CVSIGNORE environment variable (space delimited).
446 Finally in each directory any files listed in the .cvsignore file in
447 that directory are added to the list.
449 dit(bf(--suffix SUFFIX)) This option allows you to override the default
450 backup suffix used with the -b option. The default is a ~.
452 dit(bf(--csum-length LENGTH)) By default the primary checksum used in
453 rsync is a very strong 16 byte MD4 checksum. In most cases you will
454 find that a truncated version of this checksum is quite efficient, and
455 this will decrease the size of the checksum data sent over the link,
456 making things faster.
458 You can choose the number of bytes in the truncated checksum using the
459 --csum-length option. Any value less than or equal to 16 is valid.
461 Note that if you use this option then you run the risk of ending up
462 with an incorrect target file. The risk with a value of 16 is
463 microscopic and can be safely ignored (the universe will probably end
464 before it fails) but with smaller values the risk is higher.
466 Current versions of rsync actually use an adaptive algorithm for the
467 checksum length by default, using a 16 byte file checksum to determine
468 if a 2nd pass is required with a longer block checksum. Only use this
469 option if you have read the source code and know what you are doing.
471 dit(bf(-T, --temp-dir DIR)) This options instructs rsync to use DIR as a
472 scratch directory when creating a temporary copies of the files
473 transferred on the receiving side. The default behavior is to create
474 the temporary files in the receiving directory.
476 dit(bf(-z, --compress)) With this option, rsync compresses any data from
477 the source file(s) which it sends to the destination machine. This
478 option is useful on slow links. The compression method used is the
479 same method that gzip uses.
481 Note this this option typically achieves better compression ratios
482 that can be achieved by using a compressing remote shell, or a
483 compressing transport, as it takes advantage of the implicit
484 information sent for matching data blocks.
486 dit(bf(--numeric-ids)) With this option rsync will transfer numeric group
487 and user ids rather than using user and group names and mapping them
490 By default rsync will use the user name and group name to determine
491 what ownership to give files. The special uid 0 and the special group
492 0 and never mapped via user/group names even if the --numeric-ids
493 option is not specified.
495 If a user or group name does not exist on the destination system then
496 the numeric id from the source system is used instead.
498 dit(bf(--timeout=TIMEOUT)) This option allows you to set a maximum IO
499 timeout in seconds. If no data is transferred for the specified time
500 then rsync will exit. The default is 0, which means no timeout.
502 dit(bf(--daemon)) This tells rsync that it is to run as a rsync
503 daemon. If standard input is a socket then rsync will assume that it
504 is being run via inetd, otherwise it will detach from the current
505 terminal and become a background daemon. The daemon will read the
506 config file (/etc/rsyncd.conf) on each connect made by a client and
507 respond to requests accordingly. See the rsyncd.conf(5) man page for more
510 dit(bf(--config FILE)) This specifies an alternate config file than
511 the default /etc/rsyncd.conf. This is only relevant when --daemon is
514 dit(bf(--port PORT)) This specifies an alternate TCP port number to use
515 rather than the default port 873.
517 dit(bf(--stats)) This tells rsync to print a verbose set of statistics
518 on the file transfer, allowing you to tell how effective the rsync
519 algorithm is for your data. This option only works in conjunction with
520 the -v (verbose) option.
522 dit(bf(--progress)) This option tells rsync to print information
523 showing the progress of the transfer. This gives a bored user
528 manpagesection(EXCLUDE PATTERNS)
530 The exclude and include patterns specified to rsync allow for flexible
531 selection of what files to transfer and what files to skip.
533 rsync build a ordered list of include/exclude options as specified on
534 the command line. When a filename is encountered rsync then checks the
535 name against each exclude/include pattern in turn. The first matching
536 pattern is acted on. If it is an exclude pattern than that file is
537 skipped. If it is an include pattern then that filename is not
538 skipped. If no matching include/exclude pattern is found then the
539 filename is not skipped.
541 The patterns themselves can take several forms. The rules are:
544 it() if the pattern starts with a / then it is matched against the
545 start of the filename, otherwise it is matched against the end of
546 the filename. Thus /foo would match a file called foo
547 at the base of the tree whereas foo would match any file
548 called foo anywhere in the tree.
550 it() if the pattern ends with a / then it will only match a
551 directory, not a file, link or device.
553 it() if the pattern contains a wildcard character from the set
554 *?[ then regular expression matching is applied using the
555 normal shell filename matching rules. Otherwise a simple string
558 it() if the pattern contains a / (not counting a trailing /) then it
559 is matched against the full filename, including any leading
560 directory. If the pattern doesn't contain a / then it is matched
561 only against the final component of the filename.
563 it() if the pattern starts with "+ " (a plus followed by a space)
564 then it is always considered a include pattern, even if specified as
565 part of an exclude option. The "+ " part is discarded before matching.
567 it() if the pattern starts with "- " (a minus followed by a space)
568 then it is always considered a exclude pattern, even if specified as
569 part of an include option. The "- " part is discarded before matching.
571 it() if the pattern is a single exclamation mark ! then the current
572 exclude list is reset, removing all previous exclude patterns.
575 The +/- rules are most useful in exclude lists, allowing you to have a
576 single exclude list that contains both include and exclude options.
578 Here are some examples:
581 it() --exclude "*.o" would exclude all filenames matching *.o
582 it() --exclude "/foo" would exclude a file in the base directory called foo
583 it() --exclude "foo/" would exclude any directory called foo
584 it() --include "*/" --include "*.c" --exclude "*" would include all
585 directories and C source files.
588 manpagesection(ENVIRONMENT VARIABLES)
592 dit(bf(CVSIGNORE)) The CVSIGNORE environment variable supplements any
593 ignore patterns in .cvsignore files. See the --cvs-exclude option for
596 dit(bf(RSYNC_RSH)) The RSYNC_RSH environment variable allows you to
597 override the default shell used as the transport for rsync. This can
598 be used instead of the -e option.
600 dit(bf(RSYNC_PASSWORD)) Setting RSYNC_PASSWORD to the required
601 password allows you to run authenticated rsync connections to a rsync
602 daemon without user intervention. Note that this does not supply a
603 password to a shell transport such as ssh.
605 dit(bf(USER) or bf(LOGNAME)) The USER or LOGNAME environment variables
606 are used to determine the default username sent to a rsync server.
608 dit(bf(HOME)) The HOME environment variable is used to find the users
609 default .cvsignore file.
625 times are transferred as unix time_t values
627 file permissions, devices etc are transferred as native numerical
630 see also the comments on the --delete option
632 Please report bugs! The rsync bug tracking system is online at
633 url(http://samba.anu.edu.au/rsync/)(http://samba.anu.edu.au/rsync/)
635 manpagesection(VERSION)
636 This man page is current for version 2.0 of rsync
638 manpagesection(CREDITS)
640 rsync is distributed under the GNU public license. See the file
643 The primary ftp site for rsync is
644 url(ftp://samba.anu.edu.au/pub/rsync)(ftp://samba.anu.edu.au/pub/rsync).
646 A WEB site is available at
647 url(http://samba.anu.edu.au/rsync/)(http://samba.anu.edu.au/rsync/)
649 We would be delighted to hear from you if you like this program.
651 This program uses the zlib compression library written by Jean-loup
652 Gailly and Mark Adler.
654 manpagesection(THANKS)
656 Thanks to Richard Brent, Brendan Mackay, Bill Waite, Stephen Rothwell
657 and David Bell for helpful suggestions and testing of rsync. I've
658 probably missed some people, my apologies if I have.
663 rsync was written by Andrew Tridgell and Paul Mackerras. They may be
664 contacted via email at tridge@samba.anu.edu.au and
665 Paul.Mackerras@cs.anu.edu.au