Fast way to synchronize the content of your iTunes libraries – this doesn’t sync the playlists or any iTunes meta information (and you may need to perform an Add to Library .. to import any new content). This was just a quick and dirty way to sync up my iTunes downloads with another iTunes library at home. This assumes that you’ve opened up the ability to Remote Login (ssh) to the target Mac (topic for another time).

rsync -av -e ssh "Music/iTunes/iTunes Music/" ahull@10.20.1.103:"/Users/ahull/Music/iTunes/iTunes\ Music"