[Techtalk] Executing user-made commands on the command line

[Berenice]

May as well post some more questions while I'm here :)
1.  Where I can see the source code of commands such as ls or rm? 
I'm interested in seeing how they do things like flow control and
options.

2. If I create my own commands, how can I make them run like standard
linux commands (ie: just by tying in the command name at the prompt)?

Thanks 
Berenice



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