recursively add file extension to all files

Question

I have a few directories and sub-directories containing files with no file extension. I want to add .jpg to all the files contained within these directories. I\

Answer 1

Alternative command without an explicit loop (man find):

find . -type f -exec mv '{}' '{}'.jpg \;

Explanation: this recursively finds all files (-type f) starting from the current directory (.) and applies the move command (mv) to each of them. Note also the quotes around {}, so that filenames with spaces (and even newlines...) are properly handled.