Administering a critical application on a Unix server? Taking on a few Unix servers in addition to a fleet of Linux systems? If so, the command line is your friend.
Unix server administrators have thousands of commands available for configuration and management. The savvier you are about the Unix command line interface, the easier it will make your job.
Take this Unix quiz on essential commands to see where you stack up. Each question provides a Unix command. Your job is to choose which answer accurately describes the command's action.
This was first published in February 2014