For bash and awk, manpage is pretty good. They lack examples, though. The best way to get the examples is to ask someone or tutorial (online or presentation).

William

 On Sunday, July 17, 2016 8:21 AM, Stewart C. Russell via talk <talk@gtalug.org> wrote:

    A discussion came up in the Toronto Raspberry Pi
      Meetup* about suggestions for learning to work in bash. We didn't
      come up with anything much, but if you have any suggestions, I'd
      be grateful to hear them.

      cheers,

       Stewart

      *: We had a demo of a Thing That Made Really Big Sparks, plus How
      Not To Cool a Raspberry Pi 3. It was fun.

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