1. What is rsync?
Rsync is an open source, fast, versatile, can be an excellent tool to achieve synchronization of local and remote data backup full volume and incremental. windows and linux can be.
官网：http:www.samba.org/ftp/rsync/rsync.html
2.rsync Profile
Similarly scp, but it is better than incremental, scp the whole amount, but rsync are not encrypted. Can also be copied between different local directory, the full amount and increment can be. Of course, you can also delete files and directories.
So rsync = scp \ cp \ rm better than them
When synchronizing data with its own unique algorithm, only the size or sync a file or directory last modified time changes can also be synchronized to permissions, content changes, etc., it is incremental synchronization. Rsync high efficiency.