Rsync

Trying to backup remotely using rsync + ssh so the transfer is encrypted. Two things non-standard in my setup, I use a non-standard ssh port (4321), and I'm connecting from the box I want backed up, to the server. In most examples, you're connecting from the server, to the client.

$ rsync -avz -e 'ssh -p4321' /client/homedirectory remoteuser@remotehost:/remote/backup/directory

From Dir1 to Dir2: 

$ rsync -av --delete /Directory1/ /Directory2/
–delete = This tells rsync to delete any files that are in Directory2 that aren’t in Directory1.

to exclude a few:

--exclude={"/tmp/*","/proc/*"}