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Sunday, May 10, 2015

Common Regular Expressions on Linux

In this post, I am going to record some of the common regular expressions that I use on my Ubuntu. I will update these as I go along.


1. Finding a set of file names with a specific file extension.

^.*\.(jpg|JPG|gif|GIF|doc|DOC|pdf|PDF)$


2. Changing all the letters to lowercase

s/.*/\L&/g

3. Changing all letters to UPPERCASE

s/.*/\U&/g







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