The command line—that hidden world of code behind your Mac’s pretty face—sometimes offers a quicker way to do everyday tasks, plus it’s just a cool way to establish your tech cred.

The Linux file system starts with a single root directory, which is straightforward to navigate and manage. You can use basic terminal commands ... and copying/moving with cp and mv.

Here’s a quick guide on how to access files from your Android device while using the new Linux Terminal app. The Terminal app connects to an isolated instance of Debian running in a virtual ...