man(1) Manual page archive


     SUM(1)                                                     SUM(1)

     NAME
          sum, treesum - sum and count blocks in a file

     SYNOPSIS
          sum [ -5ri ] [ file ... ]

          treesum [ file ... ]

     DESCRIPTION
          By default, sum calculates and prints a 32-bit checksum, a
          byte count and the name of each file. The checksum is also a
          function of the input length.  If no files are given, the
          standard input is summed.  Other summing algorithms are
          available.  The options are

          -i   Read file names from standard input.

          -r   Sum with the algorithm of System V's sum -r and print
               the length (in 1K blocks) of the input.

          -5   Sum with System V's default algorithm and print the
               length (in 512-byte blocks) of the input.

          Sum is typically used to look for bad spots, to validate a
          file communicated over some transmission line or as a quick
          way to determine if two files might be the same.

          Treesum is similar to sum -r, except that if file is a
          directory, then treesum recursively descends it, summing all
          non-directories encountered.  If no files are given, treesum
          recursively sums the current directory.

     SEE ALSO
          wc(1)