This simple command can come in handy: Just type in “uptime” in the Terminal window to see how long it’s been since you last shut down your Mac. If you can’t remember when the OS was last updated or ...

Tech pro ThioJoe demonstrates useful Command Prompt tricks that make everyday computer tasks faster and easier to manage.

Shut down your computer in the future with “shutdown”—add “-t xxx” to delay it by xxx number of seconds (from 0 to 315,360,000, which is 10 years) and “-f” to force close any dialogs. As an example, ...