sum(1)

     NAME
          sum - checksum and count the blocks in a file

     SYNOPSIS
          sum [-rs] [--sysv] [--help] [--version] [file...]

     DESCRIPTION
          This documentation is no longer being maintained and may be
          inaccurate or incomplete.  The Texinfo documentation is now
          the authoritative source.

          This manual page documents the GNU version of sum.  sum
          computes a 16-bit checksum for each named file, or the
          standard input if none are given or when a file named `-' is
          given.  It prints the checksum for each file along with the
          number of blocks in the file (rounded up).  By default each
          corresponding file name is also printed if at least two
          arguments are specified.  With the --sysv option,
          corresponding file name are printed when there is at least
          one file argument.  By default, the GNU sum computes
          checksums using an algorithm that is compatible with the BSD
          sum and prints file sizes in units of 1K blocks.

        OPTIONS
          -r   Use the default (BSD compatible) algorithm.  This
               option is included for compatibility with the System V
               sum.  Unless the -s option was also given, it has no
               effect.

          -s, --sysv
               Compute checksums using an algorithm that is compatible
               with the one the System V sum uses by default and print
               file sizes in units of 512-byte blocks instead of 1K.

          --help
               Print a usage message and exit with a status code
               indicating success.

          --version
               Print version information on standard output then exit.