Commands for shutting down and rebooting Linux systems require privileged access. Options such as +15 refer to the number of minutes that the command will wait before doing the requested shutdown.

Each Linux command returns an exit code, with 0 indicating success and non-zero values indicating failure. You can use the $? variable to access the exit code and control program flow in scripts.

Viewing exit codes First, it’s important to remember that a successful exit code (a.k.a. “return code”) on Linux systems is 0. Think of this as meaning “zero errors”.

Let’s get to know the Linux Command Line Interface (CLI). Introduction A bit of history First look at the command line Command syntax Notes Basic commands pwd ls file cat cd clear history cp mv rm ...

1. The big one: rm -rf / This is the command every Linux administrator knows -- or should know, anyway -- to avoid. By itself, rm is very handy. It enables you to delete even the most stubborn files.

In addition to running Linux commands in a Windows 10 command prompt, you can use both native Windows programs and WSL Linux programs with each other. Even better, you can do so from a PowerShell ...