id [OPTION]... [USER]...
!subtitle:功能
获取用户的 ID。
!subtitle:类型
可执行文件（/usr/bin/id），属于 coreutils。
!subtitle:参数
OPTION 选项：
-Z, --context - 仅打印进程的安全上下文
-g, --group - 仅打印用户的有效组 ID
-G, --groups - 打印用户的所有组 ID
-n, --name - 打印名称而非 ID
-r, --real - 打印实际 ID 而非有效 ID
-u, --user - 仅打印有效用户 ID
-z, --zero - 以空字符（\0）作为行的结尾，而不是换行符（\n）
--help - 显示帮助
--version - 显示版本
USER - 用户列表，可用是用户名或用户 ID
$ id
uid=1000(primers) gid=1000(primers) groups=1000(primers),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),101(lxd)
$ id -g # 仅打印用户的有效组 ID
1000
$ id -G # 打印用户的所有组 ID
1000 4 24 27 30 46 101
$ id -nG # 打印用户的所有组名
primers adm cdrom sudo dip plugdev lxd
ID(1) User Commands ID(1)
NAME
id - print real and effective user and group IDs
SYNOPSIS
id [OPTION]... [USER]...
DESCRIPTION
Print user and group information for each specified USER, or (when USER
omitted) for the current process.
-a ignore, for compatibility with other versions
-Z, --context
print only the security context of the process
-g, --group
print only the effective group ID
-G, --groups
print all group IDs
-n, --name
print a name instead of a number, for -ugG
-r, --real
print the real ID instead of the effective ID, with -ugG
-u, --user
print only the effective user ID
-z, --zero
delimit entries with NUL characters, not whitespace;
not permitted in default format
--help display this help and exit
--version
output version information and exit
Without any OPTION, print some useful set of identified information.
AUTHOR
Written by Arnold Robbins 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/id>
or available locally via: info '(coreutils) id invocation'
GNU coreutils 9.4 April 2024 ID(1)