This is just a simple way to delete files recursively using your terminal in any UNIX-like operating system:
find . -type f -name "FILES_PATTERN" -exec rm {} \; // Example find . -type f -name "*.mp3" -exec rm {} \;
Explanation
-name “FILES_PATTERN” : File pattern.
-exec rm -rf {} \; : Delete all files that match the file pattern.
-type f : Not include directories.