Rsync
From Logicalwebhost-Wiki
you can sync stuff up using rsync, either for backup, or if you have redundant servers on a load balancer, here are some options:
-v, --verbose increase verbosity
-q, --quiet decrease verbosity
-c, --checksum always checksum
-a, --archive archive mode, equivalent to -rlptgoD
-r, --recursive recurse into directories
-R, --relative use relative path names
--no-relative turn off --relative
--no-implied-dirs don’t send implied dirs with -R
-b, --backup make backups (see --suffix & --backup-dir)
--backup-dir make backups into this directory
--suffix=SUFFIX backup suffix (default ~ w/o --backup-dir)
-u, --update update only (don’t overwrite newer files)
--inplace update the destination files inplace
-K, --keep-dirlinks treat symlinked dir on receiver as dir
-l, --links copy symlinks as symlinks
-L, --copy-links copy the referent of all symlinks
--copy-unsafe-links copy the referent of "unsafe" symlinks
--safe-links ignore "unsafe" symlinks
-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 force a fixed checksum block-size
-e, --rsh=COMMAND specify the remote shell
--rsync-path=PATH specify path to rsync on the remote machine
--existing only update files that already exist
--ignore-existing ignore files that already exist on receiver
--delete delete files that don’t exist on sender
--delete-excluded also delete excluded files on receiver
--delete-after receiver deletes after transfer, not before
--ignore-errors delete even if there are I/O errors
--max-delete=NUM don’t delete more than NUM files
--partial keep partially transferred files
--partial-dir=DIR put a partially transferred file into DIR
--force force deletion of dirs even if not empty
--numeric-ids don’t map uid/gid values by user/group name
--timeout=TIME set I/O timeout in seconds
-I, --ignore-times turn off mod time & file size quick check
--size-only ignore mod time for quick check (use size)
--modify-window=NUM compare mod times with reduced accuracy
-T --temp-dir=DIR create temporary files in directory DIR
--compare-dest=DIR also compare received files relative to DIR
--link-dest=DIR create hardlinks to DIR for unchanged files
-P equivalent to --partial --progress
-z, --compress compress file data
-C, --cvs-exclude auto ignore files in the same way CVS does
--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
--files-from=FILE read FILE for list of source-file names
-0 --from0 all file lists are delimited by nulls
--version print version number
--daemon run as an 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 I/O 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=FILE write a batch to FILE
--read-batch=FILE read a batch from FILE
--checksum-seed=NUM set block/file checksum seed
-4 --ipv4 prefer IPv4
-6 --ipv6 prefer IPv6
-h, --help show this help screen
the ones you probably care about are these:
-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.
-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.
-a, --archive
This is equivalent to -rlptgoD. It is a quick way of saying you
want recursion and want to preserve almost everything.
Note however that -a does not preserve hardlinks, because find-
ing multiply-linked files is expensive. You must separately
specify -H.
-r, --recursive
This tells rsync to copy directories recursively. If you don’t
specify this then rsync won’t copy directories at all.
