md5sum [OPTION]... [FILE]...
!subtitle:功能
计算或校验 MD5 值。
!subtitle:类型
可执行文件（/usr/bin/md5sum），属于 coreutils。
!subtitle:参数
OPTION 选项：
-b, --binary - 以二进制模式读取文件；类 UNIX 系统下始终是二进制模式
-c, --check - 从文件中读取 MD5 值进行校验
--tag- 生成 BSD 风格的输出
-t, --text - 以文本模式读取文件；类 UNIX 系统下不存在文本模式，此选项无效
-z, --zero - 以空字符（\0）作为行的结尾，而不是换行符（\n）
--ignore-missing - 校验时忽略缺失的文件
--quiet - 校验时不打印成功的消息
--status - 校验时不打印任何消息；可以通过返回值检查是否成功
--strict - 校验时严格检查格式
-w, --warn - 校验时遇到格式不正确的行时产生警告
--help - 显示帮助
--version - 显示版本
FILE - 文件列表
!subtitle:计算 MD5 值
$ md5sum 1.txt # 单个文件
79171af5e65e23a97b58c343c4de7411 1.txt
$ md5sum 1.txt 2.txt 3.txt # 多个文件
79171af5e65e23a97b58c343c4de7411 1.txt
d68dae595d597fb67c85a8301521b097 2.txt
72d93867588107cf46b2cc7ea400d0aa 3.txt
$ md5sum --tag 1.txt 2.txt 3.txt # BSD 风格
MD5 (1.txt) = 79171af5e65e23a97b58c343c4de7411
MD5 (2.txt) = d68dae595d597fb67c85a8301521b097
MD5 (3.txt) = 72d93867588107cf46b2cc7ea400d0aa
!subtitle:校验 MD5 值
$ md5sum 1.txt 2.txt 3.txt > md5.txt
$ md5sum -c md5.txt # 校验
1.txt: OK
2.txt: OK
3.txt: OK
| 命令 | 说明 |
|---|---|
| b2sum | 计算和校验 BLAKE2 值 |
| sha1sum | 计算和校验 SHA1 值 |
| sha224sum | 计算和校验 SHA224 值 |
| sha256sum | 计算和校验 SHA256 值 |
| sha384sum | 计算和校验 SHA384 值 |
| sha512sum | 计算和校验 SHA512 值 |
MD5SUM(1) User Commands MD5SUM(1)
NAME
md5sum - compute and check MD5 message digest
SYNOPSIS
md5sum [OPTION]... [FILE]...
DESCRIPTION
Print or check MD5 (128-bit) checksums.
With no FILE, or when FILE is -, read standard input.
-b, --binary
read in binary mode
-c, --check
read checksums from the FILEs and check them
--tag create a BSD-style checksum
-t, --text
read in text mode (default)
-z, --zero
end each output line with NUL, not newline, and disable file
name escaping
The following five options are useful only when verifying checksums:
--ignore-missing
don't fail or report status for missing files
--quiet
don't print OK for each successfully verified file
--status
don't output anything, status code shows success
--strict
exit non-zero for improperly formatted checksum lines
-w, --warn
warn about improperly formatted checksum lines
--help display this help and exit
--version
output version information and exit
The sums are computed as described in RFC 1321. When checking, the in‐
put should be a former output of this program. The default mode is to
print a line with: checksum, a space, a character indicating input mode
('*' for binary, ' ' for text or where binary is insignificant), and
name for each FILE.
Note: There is no difference between binary mode and text mode on GNU
systems.
BUGS
Do not use the MD5 algorithm for security related purposes. Instead,
use an SHA-2 algorithm, implemented in the programs sha224sum(1),
sha256sum(1), sha384sum(1), sha512sum(1), or the BLAKE2 algorithm, im‐
plemented in b2sum(1)
AUTHOR
Written by Ulrich Drepper, Scott Miller, and David Madore.
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
cksum(1)
Full documentation <https://www.gnu.org/software/coreutils/md5sum>
or available locally via: info '(coreutils) md5sum invocation'
GNU coreutils 9.4 April 2024 MD5SUM(1)