How to batch rename files using bash

Posted by Alex Popov on Super User See other posts from Super User or by Alex Popov
Published on 2013-11-05T08:38:30Z Indexed on 2013/11/05 9:58 UTC
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bash

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batch

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zsh

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rename

I know there are lots of such questions, but I couldn't find one (or a combination of several), which describes the things I want to do. I think I need to use regular expressions, but I am not very good with that. I use zsh. I have a folder with files, which I want to rename:

I want the files challenge1.rb, challenge2.rb, challenge3.rb, etc. to be renamed to c1.rb, c2.rb etc. Similarly task1.rb and similar must be renamed to t1.rb etc.
sample_spec_c1.rb, sample_spec_c2.rb etc. must be renamed to c1_spec.rb, c2_spec.rb etc.

So I guess I need some combination of regular expressions and iteration, but I don't know how to write the bash script.

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