Remove redundant, additional image sizes in wordpress via command line.

gistfile1.txt

Taken from: http://www.deluxeblogtips.com/2012/05/remove-image-sizes.html

If you want to remove files of specific size (for ex. 180x180), run this command:
find . -name *-180x180.* | xargs rm -f

This will remove all files with name *-180x180.* (such as screenshot-180x180.jpg), which are generated by WordPress.

Note: You can only do this if you have privilege of running Linux command on your host/server. If you don’t (in case of using shared host), you should ask your host support to do this for you.

If you want to remove all generated files, run this command:
Warning: It will remove all files with name *-*x*.* (image1-80x80.png, image2-120x100.jpg). If this pattern matches one of your original file names, then you’ll loose it. So be careful and make sure you know what you’re doing!
find . -name *-*x*.* | xargs rm -f