rsync is application software that uses differential encoding to minimize the amount of data transfer and synchronize files and directories between remote site in UNIX sytems. As a unique feature of rsync which is not found in similar programs and protocols, there is a point that transfer with a mirror site is done bidirectionally at most once. rsync displays directory contents and can copy directories and files. Optionally data compression and recursion can also be specified.
The rsync protocol daemon rsyncd uses TCP port number 873 by default. rsync can also be used to synchronize local directories, it can also be used via RSH or SSH remote shell. In the latter case, the rsync client program needs to be installed both locally and remotely.
It is released at GNU General Public License and is free software.
[vagrant@localhost ~]$ sudo lsyncd -nodaemon -log scarce /etc/lsyncd.conf
Error: failure getting absolute path of [/tmp/origin]
Error: Cannot access source directory: /tmp/origin
[vagrant@localhost ~]$ sudo lsyncd -nodaemon -log scarce /etc/lsyncd.conf
