man.postnix Miscellaneous man pages of Plan 9 related material

     SUM(1)                                                     SUM(1)

     NAME
          sum, md5sum, sha1sum - calculate file's checksum

     SYNOPSIS
          sum file ...

          md5sum [ file  ... ]

     DESCRIPTION
          Sum prints the 32-bit checksum (actually a CRC), length in
          bytes, and name of each file, one per line.  It ignores
          directories.

          Md5sum prints the MD5 message digest (as 32 hexadecimal dig-
          its) and the name of each file, separated by a tab, one per
          line.  If no files are given, the standard input is read.

          Sha1sum is similar, but uses the US National Institute of
          Standards and Technology's secure hash algorithm SHA1
          instead of MD5.  For each file, it prints its SHA1 secure
          hash (as 40 hexadecimal digits) and the file's name, sepa-
          rated by a tab, one per line.  If no files are given,
          sha1sum reads the standard input.

     SOURCE
          /appl/cmd/sum.b
          /appl/cmd/md5sum.b
          /appl/cmd/sha1sum.b

     SEE ALSO
          cmp(1), wc(1), crc(2), keyring-sha(2)

     Page 1                       Plan 9            (printed 12/17/25)