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sum.1
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SUM(1L) MISC. REFERENCE MANUAL PAGES SUM(1L)
NAME
sum - checksum and count the blocks in a file
SYNOPSIS
sum [-rs] [--sysv] [file...]
DESCRIPTION
This manual page documents the GNU version of sum. sum com-
putes 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), and the file name unless
no arguments were given. 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, --_s_y_s_v
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.
The long-named options can be introduced with `+' as well as
`--', for compatibility with previous releases. Eventually
support for `+' will be removed, because it is incompatible
with the POSIX.2 standard.
Sun Release 4.1 Last change: 1