While Linux systems install with thousands of commands, bash also supplies a large number of “built-ins”—commands that are not sitting in the file system as separate files, but are part of bash itself ...

Enable the Linux terminal on any Android device, and you can create or practice your bash scripting on the go.

Check if a file is really a file, whether a string contains anything, and whether you can run a program with these vital patterns.

Bulky, assorted files filling up my Downloads folder are no more.