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- SUM(1L) MISC. REFERENCE MANUAL PAGES SUM(1L)
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- NAME
- sum - checksum and count the blocks in a file
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- SYNOPSIS
- sum [-rs] [--sysv] [file...]
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- 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.
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- 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.
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- -_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.
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- 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.
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- Sun Release 4.1 Last change: 1
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