These [0] two [1] sections of the GNU Bash man pages were very useful. I also found that this tutorial [2] provided a useful perspective. I spent a small amount of time looking through the bash-completion [3] project as well as the git bash completions [4].

Generally, my process for writing is google around until I have some base level of knowledge, then building one or more demo applications to ensure my understanding is correct. Then as I'm writing the blog post I'll be refining the demo applications into examples for the blog post and/or library code that I want to open source.

[0]: https://www.gnu.org/software/bash/manual/html_node/Programma... [1]: https://www.gnu.org/software/bash/manual/html_node/Programma... [2]: https://hackaday.com/2018/01/19/linux-fu-custom-bash-command... [3]: https://github.com/scop/bash-completion [4]: https://github.com/git/git/blob/master/contrib/completion/gi...