compute and check MD5 message digest


Calculate the MD5 checksum for a file

$ md5sum [filename1]

Calculate MD5 checksums for multiple files

$ md5sum [filename1] [filename2]

Read a file of MD5SUMs and verify all files have matching checksums

$ md5sum -c [filename.md5]

Calculate a MD5 checksum from the standard input

$ echo "[text]" | md5sum


md5sum [ OPTION ]...[ FILE ]...


Print or check MD5 (128 -bit) checksums.

With no FILE, or when FILE is -, read standard input.

-b , --binary read in binary mode

-c , --check read MD5 sums from the FILEs and check them

--tag create a BSD -style checksum

-t , --text read in text mode (default)

-z , --zero end each output line with NUL, not newline, and disable file name escaping

The following five options are useful only when verifying checksums:

--ignore -missing don't fail or report status for missing files

--quiet don't print OK for each successfully verified file

--status don't output anything, status code shows success

--strict exit non -zero for improperly formatted checksum lines

-w , --warn warn about improperly formatted checksum lines

--help display this help and exit

--version output version information and exit

The sums are computed as described in RFC 1321. When checking, the input should be a former output of this program. The default mode is to print a line with checksum, a space, a character indicating input mode ('*' for binary, ' ' for text or where binary is insignificant), and name for each FILE.


Do not use the MD5 algorithm for security related purposes. Instead, use an SHA -2 algorithm, implemented in the programs sha224sum(1), sha256sum(1), sha384sum(1), sha512sum(1), or the BLAKE2 algorithm, implemented in b2sum(1)


GNU coreutils online help: <>
Report any translation bugs to <>


Copyright 2019 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.


Full documentation <> or available locally via: info md5sum invocation


Written by Ulrich Drepper, Scott Miller, and David Madore.

Copied to clipboard
free 100$ digital ocean credit