How to validate unsupported Flags on Bash Script on Ubuntu 22.04
Flags, also known as command-line options, are additional parameters passed to a script when it is executed. They modify the script’s behaviour or specify certain settings. These flags are usually single-character letters preceded by a hyphen.
For more explanation on this video: https://www.linuxhelp.com/how-to-validate-unsupported-flags-on-bash-script-on-ubuntu-22-04
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