sum [OPTION]... [FILE]...
!subtitle:功能
查看文件的校验和和块数。
!subtitle:类型
可执行文件（/usr/bin/sum），属于 coreutils。
!subtitle:参数
OPTION 选项：
-r - 使用 BSD 求和算法（默认）；块大小为 1K
-s, --sysv - 使用 System V 求和算法；块大小为 512 字节
--help - 显示帮助
--version - 显示版本
FILE - 文件列表；如果没有这个参数或指定为 -，则读取标准输入
$ sum 1.txt # 使用 BSD 算法
08227 1 1.txt
$ sum -s 1.txt # 使用 System V 算法
3977 1 1.txt
SUM(1) User Commands SUM(1)
NAME
sum - checksum and count the blocks in a file
SYNOPSIS
sum [OPTION]... [FILE]...
DESCRIPTION
Print or check BSD (16-bit) checksums.
With no FILE, or when FILE is -, read standard input.
-r use BSD sum algorithm (the default), use 1K blocks
-s, --sysv
use System V sum algorithm, use 512 bytes blocks
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by Kayvan Aghaiepour and David MacKenzie.
REPORTING BUGS
GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
Report any translation bugs to <https://translationproject.org/team/>
COPYRIGHT
Copyright © 2023 Free Software Foundation, Inc. License GPLv3+: GNU
GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
Full documentation <https://www.gnu.org/software/coreutils/sum>
or available locally via: info '(coreutils) sum invocation'
GNU coreutils 9.4 April 2024 SUM(1)