cmp - compare two files byte by byte


cmp [OPTION]... FILE1 [FILE2 [SKIP1 [SKIP2]]]


Compare two files byte by byte.
-b --print-bytes
 Print differing bytes.
-i SKIP --ignore-initial=SKIP
 Skip the first SKIP bytes of input.
-i SKIP1:SKIP2 --ignore-initial=SKIP1:SKIP2
Skip the first SKIP1 bytes of FILE1 and the first SKIP2 bytes of FILE2.
-l --verbose
 Output byte numbers and values of all differing bytes.
-n LIMIT --bytes=LIMIT
 Compare at most LIMIT bytes.
-s --quiet --silent
 Output nothing; yield exit status only.
-v --version
 Output version info.
--help Output this help.
SKIP1 and SKIP2 are the number of bytes to skip in each file. SKIP values may be followed by the following multiplicative suffixes: kB 1000, K 1024, MB 1,000,000, M 1,048,576, GB 1,000,000,000, G 1,073,741,824, and so on for T, P, E, Z, Y.

If a FILE is ‘-’ or missing, read standard input. Exit status is 0 if inputs are the same, 1 if different, 2 if trouble.


Written by Torbjorn Granlund and David MacKenzie.


Report bugs to <>.


Copyright © 2007 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.


The full documentation for cmp is maintained as a Texinfo manual. If the info and cmp programs are properly installed at your site, the command
info diff
should give you access to the complete manual.

openSUSE Logo