Strip Characters From a String Using Bash

Today I ran into the scenario where I want to use bash/zsh to remove the file extension from a string. I wanted to read in the filename, then create a directory based on the filename. If you copy/paste the following into your terminal, you should see it work.

echo ${filename%.*}

Or if you’re using it inside of a zsh function and passing in a parameter:

echo ${1%.*}

Whereas you would usually use $1 to read the parameter, this time we’re using the substituation syntax to both read and remove the . and everything after.

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