I want to backup certain dirs if not all of them to a backup dedicated server. I am not sure if it will be in or ouside the same datacenter, so if you can help with both. That would be great!

1) How do I automaticly backup my main server to a backup server (specific dirs, due to me being a shared reseller and don't want to backup entire host )
2) I suppose rsync is the best, but. I have no CLUE on how to use it. lol
3) Where can I get a CHEAP backup server (not asking for quotes, just suggestions) and what specs do I need? I can figure out the HD.

Any other suggestions would be greatly appreciated!

Thank You!