I know that OS X automatically does some maintainance in the background (cron). But I have my iBook go to sleep when not in use, so those tasks doesn't get done. So I want to know how to do it manually. What commands do I use? cron daily, cron weekly, and cron monthly? Is that right? And what other maintainence should I do regularly in OS X? (Please don't recommend software - I know about OynX and MacJanitor and the such, but I rather do it myself.) Thanks!