#!/bin/bash

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A community to discuss about Bash.

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. The shell's name is an acronym for Bourne-Again SHell, a pun on the name of the Bourne shell that it replaces and the notion of being "born again".

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How do you check if a file ends in a certain file extension in bash? (lemmynsfw.com)

submitted 5 months ago* (last edited 5 months ago) by PenisWenisGenius@lemmynsfw.com to c/bash@programming.dev

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Seriously. There doesn't seem to be a way to do this. Every thing I ever try I just get bad substitution errors. The internet is full of people posting code that's supposed to compare file extensions but none of it works. I've spent all morning trying everything I could find. I already gave up and I'm making this progeam in python instead but now I'm curious. How tf do you actually compare file extensions? If I have a folder fill of files and I want to run a command only on the png files, there seems to be no way to actually do this.

If someone posts "[[ $file == *.txt ]]" I'm going to fucking scream because THAT DOES NOT WORK. IT'S NOT VAILD BASH CODE.

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[–] best_username_ever@sh.itjust.works 4 points 5 months ago (1 children)

https://stackoverflow.com/q/965053 ?

[–] OpenStars@discuss.online 6 points 5 months ago

I loved this comment:

What is the extension of the file xyzzy.tar.gz? Or plugh.cfg.saved? In other words, are you treating extension as a simple technical issue or a semantic one?

For an OS that does not have file "extensions", it's entirely up to the user to define whatever it is that they are trying to accomplish.