Hola! Ungzipping all files in one line
For *.gz
find -name '*.gz' -exec tar xzv '{}' ';'
For *.tar.gz
find -name '*.tar.gz' -exec tar xzvf '{}' ';'
It uses all the files that ‘find’ outputs and send it to tar. Same can be applied to any other archive, just change the respective parameters.