Create a Chat Server in Linux and 5 Other Terminal Tricks

A collection of practical Linux command line tricks: create a terminal chat server with nc, sum column values on the fly with awk, remove orphan packages, find your local and public IP, enable colored terminal output, and use hash tags to find long commands fast.
These are not complicated one-line commands you’ll forget after a day. They are simple and practical tricks that help solve real problems and make working in the Linux terminal faster and easier over time.