<https://www.ihaveapc.com/tag/how-to-get-a-list-of-bash-commands-in-ubuntulinux-mint/#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.ihaveapc.com/tag/how-to-get-a-list-of-bash-commands-in-ubuntulinux-mint/>