Kill commands Then, there are the various kill commands — including kill, pkill, xkill, and killall. The xkill command is a kill command for X Windows, so I won’t cover it here.

Linux is the most secure OS on the market for a reason. These are the security-centric commands you should have in your back pocket.

pkill If you manage Unix systems, you’ve probably made us of the pkill command to kill a process without first having to run a command to determine the process’s process ID.