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

Do it this way:

find . -name '123*.txt' -type f -exec bash -c 'mv "$1" "${1/\/123_//}"' -- {} \;

Advantages:

• No pipes, no reads, no chance of breaking on malformed filenames.
• Only one non-standard tool or feature: bash.