Are you looking for a single line command that removes all the current directory and all sub-folders of a specific extension? (eg: *.jpg). Here’s the solution.
find . -name "*.jpg" -delete
NOTE: Use this option with extreme caution. This Linux command will remove the entire files that ending with *.jpg. Be sure to check your directory is correct before running the command.
Disclaimer: If you don’t know about Linux or never use it before. Please don’t proceed this, this command is risky. Proceed at your own risk.