«Hide in your shell, 'cause the world is out to bleed you for a ride»
In computer science, a shell is the thin layer (whence the name) surrounding the operating system and that interfaces the user with the machine.
I mainly use Bash, which is what this page is about.
laussy@azag:~$ man woman
No manual entry for woman
Customization of file completion can be done in /etc/bash_completion/. I use that for showme for instance.