if you really want to go nuts - https://en.wikipedia.org/wiki/Util-linux https://en.wikipedia.org/wiki/Util-linux read all the pages, explore all the man page

if you really want to go nuts - https://en.wikipedia.org/wiki/Util-linux https://en.wikipedia.org/wiki/Util-linux read all the pages, explore all the man pages, then experiment and learn.