Find WordPress generated thumbnails and execute a command

find-exec-thumbs.sh

# Becareful! This is not tested with every kind of names and isn't ok to use in production.
# So, never execute rm in these files. Please. Or the world will end.
# 
# Be sure to run this command in wp-content/uploads.
# Please comment if any strange behavior.

# creates backup folder
mkdir -p ~/bkp

# finds thumbs and move then to ~/bkp. You can run any command after the -exec flag.
# {} is the path relative to where find was executed.
find . -iregex ".*/.*\-[0-9].*x[0-9].*\.jpg" -exec mv {} ~/bkp \;