There are three facts we can use to our advantage: The option variable ("optvar") stores the option name currently being processed (e.g., a, b, or c). When complete, getopts returns a number greater ...

If you've written any amount of bash code, you've likely come across the trap command. Trap allows you to catch signals and execute code when they occur. Signals are asynchronous notifications that ...

If you're serious about security on your Linux machines, you might want to clear the bash history. Learn how to do this more effectively than with just a single command. On your Linux machines, a ...