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Re:Ask HN: How can I get better at bash? by nunull on Monday June 26, 2017 @05:41AM (#14635385)
Not the first thing to look for, but I've found ShellCheck[1] to be pretty helpful when it comes to correcting typical mistakes.

[1]: https://github.com/koalaman/shellcheck

Re:Ask HN: How can I get better at bash? by mafro on Monday June 26, 2017 @06:27AM (#14635620)
Seconded. Running ShellCheck integrated with your editor (easy with vim/Syntastic) is really great way to improve your bash skills.

It will highlight common mistakes, and their wiki explains each one detail and how you should use an alternate, better implementation.

Re:Ask HN: How can I get better at bash? by 12s12m on Tuesday June 27, 2017 @02:30AM (#14642951)
This is a great addition while writing bash scripts. Catches a lot of the bad stuff.