This blog post documents my understanding of how the conventions for Unix command line syntax have evolved over time. It’s not properly sourced, and may well be quite wrong. I’ve not been using Unix until 1989, so I wasn’t there for the early years.

A resource for exploring the design of command-line utilities. It is best used as an accompaniment providing useful background while reading the source code of the utility you may be interested in

Explanation of everything you can see in htop/top on Linux

Tutorial on GnuPG’s features to sign, verify, encrypt, and decrypt files and messages for distribution over untrusted channels like the internet.