Linux 是否有列出所有 Unix 组名称的命令？
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Is there a command to list all Unix group names?
提问by cavila
I know there is the /etc/groupfile that lists all users groups.
我知道有一个/etc/group文件列出了所有用户组。
I would like to know if there is a simple command to list all user group names in spite of parsing the world readable /etc/groupfile. I am willing to create an administrator web page that lists Linux accounts' group names.
我想知道是否有一个简单的命令来列出所有用户组名称，尽管解析了世界可读/etc/group文件。我愿意创建一个列出 Linux 帐户组名称的管理员网页。
采纳答案by Arpit
To list all local groups which have users assigned to them, use this command:
要列出分配有用户的所有本地组，请使用以下命令：
cut -d: -f1 /etc/group | sort
For more info- > Unix groups, Cut command, sort command
回答by dasup
If you want all groupsknown to the system, I would recommend using getent groupinstead of parsing /etc/group:
如果您希望系统知道所有组，我建议使用getent group而不是解析/etc/group：
getent group
The reason is that on networked systems, groups may not only read from /etc/groupfile, but also obtained through LDAP or Yellow Pages (the list of known groups comes from the local group file plus groups received via LDAP or YP in these cases).
原因是在网络系统上，组不仅可以从/etc/group文件中读取，还可以通过 LDAP 或黄页获取（在这些情况下，已知组列表来自本地组文件加上通过 LDAP 或 YP 接收的组）。
If you want just the group names you can use:
如果你只想要组名，你可以使用：
getent group | cut -d: -f1
回答by kenorb
On Linux, macOS and Unix to display the groups to which you belong, use:
在 Linux、macOS 和 Unix 上，要显示您所属的组，请使用：
id -Gn
which is equivalent to groupsutility which has been obsoleted on Unix (as per Unix manual).
这相当于groups在 Unix 上已经过时的实用程序（根据Unix 手册）。
On macOS and Unix, the command id -pis suggested for normal interactive.
在 macOS 和 Unix 上，id -p建议使用该命令进行正常交互。
Explanation of the parameters:
参数说明：
-G,--groups- print all group IDs
-n,--name- print a name instead of a number, for-ugG
-p- Make the output human-readable.
-G,--groups- 打印所有组 ID
-n,--name- 打印名称而不是数字，用于-ugG
-p- 使输出可读。
