Question: how to install rsync on linux?
Answer: On Debian/Ubuntu based systems: sudo apt-get install rsync.
On CentOS/RHEL based systems: yum install rsync.
On SUSE/OpenSUSE systems: zypper in rsync. ... 
To synchronize a directory from local system with a remote system, enter the following command: rsync -azvr /home/sk/Downloads/ sk@192.168.1.250:/home/sk/sync.