Find and replace filename recursively in a directory

Question

I want to rename all the files in a folder which starts with 123_xxx.txt to xxx.txt.

For example, my directory has:

123_xxx         


        

Answer 1

find -name "123*.txt" -exec rename 's/^123_//' {} ";" 

will do it. No AWK, no for, no xargs needed, but rename, a very useful command from the Perl lib. It is not always included with Linux, but is easy to install from the repos.