Exit codes on the Linux command line are numeric values that provide feedback on whether the command just run was successful or ran into some variety of problem. If you’ve never noticed them ...

An exit code other than 0 indicates that a script or a command has failed in some way. Learn more about exit codes and the types of errors they represent in this post.

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.

Last month, we looked at signals, the rudimentary mechanism that processes on a Linux box can use to communicate events and state changes. We talked about how each of the signals can be sent manually ...

Make sure, when you’re done with your screens, to reconnect to them, end their commands, and exit. A must-use command. If you frequently remote into your Linux servers, and you want to make sure ...