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rsync Know-how rsync is a file transfer program capable of efficient remote update via a fast differencing algorithm. See also everythinglinux.org/rsync

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rsync  version 2.5.4  protocol version 26
Copyright (C) 1996-2002 by Andrew Tridgell and others

Capabilities: 64-bit files, socketpairs, hard links, symlinks, batchfiles, IPv6,
              64-bit system inums, 64-bit internal inums

Usage: rsync [OPTION]... SRC [SRC]... [USER@]HOST:DEST
  or   rsync [OPTION]... [USER@]HOST:SRC DEST
  or   rsync [OPTION]... SRC [SRC]... DEST
  or   rsync [OPTION]... [USER@]HOST::SRC [DEST]
  or   rsync [OPTION]... SRC [SRC]... [USER@]HOST::DEST
  or   rsync [OPTION]... rsync://[USER@]HOST[:PORT]/SRC [DEST]
SRC on single-colon remote HOST will be expanded by remote shell
SRC on server remote HOST may contain shell wildcards or multiple
  sources separated by space as long as they have same top-level

Options
 -v, --verbose               increase verbosity
 -q, --quiet                 decrease verbosity
 -c, --checksum              always checksum
 -a, --archive               archive mode
 -r, --recursive             recurse into directories
 -R, --relative              use relative path names
 -b, --backup                make backups (default ~ suffix)
     --backup-dir            make backups into this directory
     --suffix=SUFFIX         override backup suffix
 -u, --update                update only (don't overwrite newer files)
 -l, --links                 copy symlinks as symlinks
 -L, --copy-links            copy the referent of symlinks
     --copy-unsafe-links     copy links outside the source tree
     --safe-links            ignore links outside the destination tree
 -H, --hard-links            preserve hard links
 -p, --perms                 preserve permissions
 -o, --owner                 preserve owner (root only)
 -g, --group                 preserve group
 -D, --devices               preserve devices (root only)
 -t, --times                 preserve times
 -S, --sparse                handle sparse files efficiently
 -n, --dry-run               show what would have been transferred
 -W, --whole-file            copy whole files, no incremental checks
     --no-whole-file         turn off --whole-file
 -x, --one-file-system       don't cross filesystem boundaries
 -B, --block-size=SIZE       checksum blocking size (default 700)
 -e, --rsh=COMMAND           specify rsh replacement
     --rsync-path=PATH       specify path to rsync on the remote machine
 -C, --cvs-exclude           auto ignore files in the same way CVS does
     --existing              only update files that already exist
     --ignore-existing       ignore files that already exist on the receiving side
     --delete                delete files that don't exist on the sending side
     --delete-excluded       also delete excluded files on the receiving side
     --delete-after          delete after transferring, not before
     --ignore-errors         delete even if there are IO errors
     --max-delete=NUM        don't delete more than NUM files
     --partial               keep partially transferred files
     --force                 force deletion of directories even if not empty
     --numeric-ids           don't map uid/gid values by user/group name
     --timeout=TIME          set IO timeout in seconds
 -I, --ignore-times          don't exclude files that match length and time
     --size-only             only use file size when determining if a file should be transferred
     --modify-window=NUM     Timestamp window (seconds) for file match (default=0)
 -T  --temp-dir=DIR          create temporary files in directory DIR
     --compare-dest=DIR      also compare destination files relative to DIR
 -P                          equivalent to --partial --progress
 -z, --compress              compress file data
     --exclude=PATTERN       exclude files matching PATTERN
     --exclude-from=FILE     exclude patterns listed in FILE
     --include=PATTERN       don't exclude files matching PATTERN
     --include-from=FILE     don't exclude patterns listed in FILE
     --version               print version number
     --daemon                run as a rsync daemon
     --no-detach             do not detach from the parent
     --address=ADDRESS       bind to the specified address
     --config=FILE           specify alternate rsyncd.conf file
     --port=PORT             specify alternate rsyncd port number
     --blocking-io           use blocking IO for the remote shell
     --no-blocking-io        turn off --blocking-io
     --stats                 give some file transfer stats
     --progress              show progress during transfer
     --log-format=FORMAT     log file transfers using specified format
     --password-file=FILE    get password from FILE
     --bwlimit=KBPS          limit I/O bandwidth, KBytes per second
     --write-batch=PREFIX    write batch fileset starting with PREFIX
     --read-batch=PREFIX     read batch fileset starting with PREFIX
 -h, --help                  show this help screen
 -4                          prefer IPv4
 -6                          prefer IPv6

Please see the rsync(1) and rsyncd.conf(5) man pages for full documentation See http://rsync.samba.org/ for updates, bug reports, and answers