How to use rsync

by

Please shareShare on FacebookShare on Google+Tweet about this on TwitterShare on LinkedInShare on RedditDigg thisShare on StumbleUpon

So what is unique about rsync?

It can perform differential uploads and downloads (synchronization) of files across the network, transferring only data that has changed. The rsync remote-update protocol allows rsync to transfer just the differences between two sets of files across the network connection.

 

How do I install rsync?

Use any one of the following commands to install rsync.

If you are using Debian or Ubuntu Linux, type the following command

# apt-get install rsync
OR
$ sudo apt-get install rsync

If you are using Red Hat Enterprise Linux (RHEL), type the following command

# up2date rsync

If you are using CentOS/Fedora Core Linux, type the following command

# yum install rsync

Always use rsync over ssh

Since rsync does not provide any security while transferring data it is recommended that you use rsync over ssh . This allows a secure remote connection. Now let us see some examples of rsync.

rsync command common options

  • –delete : delete files that don’t exist on sender (system)
  • -v : Verbose (try -vv for more detailed information)
  • -e “ssh options” : specify the ssh as remote shell
  • -a : archive mode
  • -r : recurse into directories
  • -z : compress file data

Task : Copy file from a local computer to a remote server

Copy file from /www/backup.tar.gz to a remote server called unixmen.net
$ rsync -v -e ssh /www/backup.tar.gz jerry@openbsd.nixcraft.in:~Output:

Password:
sent 19099 bytes received 36 bytes 1093.43 bytes/sec
total size is 19014 speedup is 0.99

Please note that symbol ~ indicate the users home directory (/home/jerry).

Task : Copy file from a remote server to a local computer

Copy file /home/jerry/webroot.txt from a remote server unixmen.net to a local computer /tmp directory:
$ rsync -v -e ssh jerry@unixmen.net:~/webroot.txt /tmp
Password

Task: Synchronize a local directory with a remote directory

$ rsync -r -a -v -e “ssh -l jerry” –delete unximen.net:/webroot/ /local/webroot

Task: Synchronize a remote directory with a local directory

$ rsync -r -a -v -e “ssh -l jerry” –delete /local/webroot unixmen.net:/webroot

Task: Synchronize a local directory with a remote rsync server

$ rsync -r -a -v –delete rsync://rsync.unixmen.net/cvs /home/cvs

Task: Mirror a directory between my “old” and “new” web server/ftp

You can mirror a directory between my “old” (my.old.server.com) and “new” web server with the command (assuming that ssh keys are set for password less authentication)
$ rsync -zavrR –delete –links –rsh=”ssh -l vivek” my.old.server.com:/home/lighttpd /home/lighttpd

rsync for Windows server/XP

Please note if you are using Windows, try any one of the program:

  1. DeltaCopy
  2. NasBackup

Source: cyberciti