SUM(1-SysV)         RISC/os Reference Manual          SUM(1-SysV)



NAME
     sum - print checksum and block count of a file

SYNOPSIS
     sum [ -r ] file

DESCRIPTION
     sum calculates and prints a 16-bit checksum for the named
     file, and also prints the number of blocks in the file.  It
     is typically used to look for bad spots, or to validate a
     file communicated over some transmission line.

     The option -r causes an alternate algorithm to be used in
     computing the checksum.  This alternate algorithm is compat-
     able with BSD-based systems.

SEE ALSO
     wc(1).

DIAGNOSTICS
     ``Read error'' is indistinguishable from end of file on most
     devices; check the block count.

































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