compare files line by line |
-q, --brief report only when files differ |
-r, --recursive recursively compare any subdirectories found |
FILES are `FILE1 FILE2' or `DIR1 DIR2' or `DIR FILE...' or `FILE... DIR'. If --from-file or --to-file is given, there are no restrictions on FILE(s). If a FILE is `-', read standard input. Exit status is 0 if inputs are the same, 1 if different, 2 if trouble. |