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Programming @programming.dev zephyr @lemmy.world 1y ago

How do you shell expand your variables and why?

Shell Scripting @programming.dev Gamma @programming.dev 1y ago

How do you shell expand your variables and why?

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find “$(echo $HOME > variable_holder.txt && cat variable_holder.txt)/$(cat alphabet.txt | grep “d”) $(cat alphabet.txt | grep “o”)$(cat alphabet.txt | grep “c”)$(cat alphabet.txt | grep “s”)”

This is the easiest method
- when you're paid by character written
- @ilega_dh You don't need cat in cases when grep "d" alphabet.txt can read from file too. Edit: But obviously your comment was more of a joke to over complicate it. So never mind then.
  
  To be safe, should probably output grep to a file, then cat that.
  
  Agreed. Everything in Linux is a file so let’s keep it that way.
- What should I search to better understand what is written here? Don't mind learning myself, just looking for the correct keywords. Thanks!
  
  This comment is a joke and you wouldn't want to do it like that in reality, but here are some related keywords you could look up: "Unix cat", "Unix pipeline", "grep", "output redirection", "command substitution".
  
  Perfect, I have some light reading for the evening!
  
  Read the Bash manual. That one patter on the GP is called "Command Substitution", you can search for it.
  
  Thanks!
  
  ExplainShell should help

27 comments