Managing files across a remote connection, or sat at your desk, the Linux terminal is the place to be. Learn how one command can be used for two different purposes.

The Linux comm command makes it easy to compare a couple text files and determine if they both contain the same lines -- whether the file contents are sorted or not.

There's a lot to learn about image files on the command line, from verifying file format to finding out where and when photos were taken and maybe even getting an unusual view of what they look like.