Simple Full Backup Script
It depends on you backup strategy, you can use home made scripts or some open source softwares for your Linux server.
I wrote a simple bash script that I needed in order to make a full backup of my system:
/home/ /etc/ /opt/ ..etc
I pushed the script to Github (SimpleFullBackup), you can use it like this:
wget -O - https://github.com/eon01/SimpleFullBackup/raw/master/simplefullbackup.sh | sudo bash
This script will create /backups folder and will create a .tar.gz archive having the actual date as name suffix.