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.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.50.1.
.TH SUM "1" "February 2026" "GNU coreutils 9.10" "User Commands"
.SH NAME
sum \- checksum and count the blocks in a file
.SH SYNOPSIS
.B sum
[\fI\,OPTION\/\fR]... [\fI\,FILE\/\fR]...
.SH DESCRIPTION
.\" Add any additional description here
.PP
Print or check BSD (16\-bit) checksums.
Legacy interface to the cksum utility.
.PP
With no FILE, or when FILE is \-, read standard input.
.TP
\X'tty: link https://www.gnu.org/software/coreutils/manual/coreutils.html#sum-r'\fB\-r\fP\X'tty: link'
use BSD sum algorithm (the default), use 1K blocks
.TP
\X'tty: link https://www.gnu.org/software/coreutils/manual/coreutils.html#sum-s'\fB\-s, \-\-sysv\fP\X'tty: link'
use System V sum algorithm, use 512 bytes blocks
.TP
\X'tty: link https://www.gnu.org/software/coreutils/sum#sum--help'\fB\-\-help\fP\X'tty: link'
display this help and exit
.TP
\X'tty: link https://www.gnu.org/software/coreutils/sum#sum--version'\fB\-\-version\fP\X'tty: link'
output version information and exit
.SH AUTHOR
Written by Kayvan Aghaiepour and David MacKenzie.
.SH "REPORTING BUGS"
Report bugs to: bug\-coreutils@gnu.org
.br
GNU coreutils home page: <https://www.gnu.org/software/coreutils/>
.br
General help using GNU software: <https://www.gnu.org/gethelp/>
.br
Report any translation bugs to <https://translationproject.org/team/>
.SH COPYRIGHT
Copyright \(co 2026 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
.br
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
.SH "SEE ALSO"
Full documentation <https://www.gnu.org/software/coreutils/sum>
.br
or available locally via: info \(aq(coreutils) sum invocation\(aq
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