First, download and install the Grsync GUI using the instruction applicable to your Linux distribution. When you run the program you should see this:
Source is the directory you wish to backup. This is usually /
Destination is the login credentials followed by the destination folder of the backup. It is usually (username).(organization code)@sync.itel.com:(destination directory). Typically you would want to name the destination directory according to the machine name of the system you are backing up.
To set up scheduled backups you would first ensure that Grsync can run passwordless using your provided public key. Then create a cron job similar to this (to make a backup everyday at 2am):
0 2 * * * grsync -e "default"