I’m interested in the rsync part for backups, do you have a good guide or video for that? Thanks
I don't really have a guide or anything for it to hand, but essentially what that alias is doing is:
rsync= running rsync--ignore-existing= as you might have guessed, this tells rsync not to copy a file if it already exists at the destination.-rav= additional arguments. r = recursive, IE also copy subfolders. a = archive mode, preserves things like symlinks etc. and v = verbose, just tells you extra info about what's going on.
So with that alias, I can just type rs [target folder] [destination folder] and it'll copy it across exactly as it is, ignore anything that's already there and tell me precisely what it's doing.