Given two directory trees, how can I find out which files differ?
If I want find the differences between two directory trees, I usually just execute: diff -r dir1/ dir2/ This outputs exactly what the differences are between corresponding files. I'm interested in just getting a list of corresponding files whose content differs. I assumed that this would simply be a matter of passing a command line option to `diff`, but I couldn't find anything on the man page. Any suggestions?