GUIs are great—we wouldn’t want to live without them. But if you’re a Mac or Linux user and you want to get the most out of your operating system (and your keystrokes), you owe it to yourself to get ...

When I need to work with Linux user accounts, I tend to default to the command line. Sure, there are GUIs for this purpose, but I find the command line to be more efficient and effective at this task.

I used to rely on the “finger -i” command to tell me how many users were logged into systems I managed and how long each of them had been idle. If I needed to reboot a system and the only users logged ...