Substring extraction in bash

Revision history
Tags: bash

To extract substrings from variables in bash, we can use the following syntax



Get the file extension of a filename

$ filename=foobar.txt
$ echo ${filename: -4}

Get the file name without extension

$ filename=foobar.txt
$ echo ${filename:0: -4}


If you have any comments or feedback, please send me an e-mail. (stig at stigok dotcom).

Did you find any typos, incorrect information, or have something to add? Then please propose a change to this post.