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 acquainted with the Unix command line.

Perhaps the primary disadvantage of Unix is the steep learning curve associated with using the software. Using the operating system to its full potential requires learning the Unix shell commands ...

Unix systems, as different as they might be, have a lot in common with each other. Type the ‘ls’ command on any Unix system and something predictable happens: You will see a file listing. The ...

If you're new to the UNIX operating system, especially if you're familiar with Windows, you'll find that the file access control mechanisms might not be exactly what you expect.

Producing the document was no easy task, because at that point the Unix operating system grew by the week; budding aficionados added new commands and features to the system on a regular basis.

Back in '70s and early '80s, if you used a computer, you used a command line. DOS -- the disk operating system that runs atop IBM PCs -- used a command line interface, and that's what UNIX used too.