rsync and tar commands are used for taking backups in Linux systems. rsync and tar are explained with example command usages.
bash idioms are tiny scripts, mostly one-liners, that accomplish a lot and can be used as building blocks in larger scripts.
Unison is a file synchronization tool. It synchronizes directory trees on two hosts both ways, so that the files at both ends are the latest.
To backup a Drupal site, website root directory and database dump are copied to a local server. The backup commands are explained.
rsync is a file synchronization tool for making that the destination files become an exact replica of corresponding files at the source.