What are the commands for this ?

 
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Old 04-16-2018
- What happens if you run the menu item 3 's code by itself, both with and without echo? You might want to pipe it through od -tx1c.
- I don't think diff is the correct way to compare numbers in shell. You did that in your other thread before.

Asides:
- Your item 1 code doesn't satisfy the request / task (list directory).
- Please note you don't need echo and "command substitution" to output a command's output to screen.
- And, the backtick syntax `...` is outdated and deprecated - use $(...) for "command substitution".
- Do you know bash's select builtin?
 
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NAME
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