Sometimes working with a directory full of subdirectories and files you need to compare the directories and files to another version of the files. This comes in extremely useful when restoring a hacked website. To do this you need to have the old copy and the current copy in two different directories on your system. Then run the command below replacing DIR1 and DIR2 with the directoires you would like to compare. This works through the entire directory because of the -r option which stand for recursive. The -q option suppresses the entire output and only outputs the files the differ.