Linux 命令“getent group”没有返回某些组的用户？
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Linux command 'getent group' not returning users for some groups?
提问by Harinder
I am using getent groupcommand to get the groupsalong with there usernames in linux. But it is not showing any usernamesfor some groupswhich i know exist.
我使用getent group命令来获取groups与那里的用户名一起linux。但是usernames对于groups我知道存在的某些内容，它没有显示任何内容。
i need this info is there any other way around?
我需要这个信息还有其他方法吗？
Picking up 1st two results :--
选择第一个两个结果：--
root:x:0:
bin:x:1:bin,daemon
as you can see there are no users for group root and 2 users in bin group. I know that the root group contains a user root but its now showing it here.
如您所见，root 组没有用户，bin 组中有 2 个用户。我知道 root 组包含一个用户 root 但它现在在这里显示它。
采纳答案by twalberg
What you are missing is that each user has a primary group, which is stored in /etc/passwd(usually in field 4), and may have one or more supplementary groups. Only the supplementary group associations are in /etc/group, and as a result, are the only ones that getent groupwill show. In order to get the entire list of groups for a particular user, you can use id -a <user>, but you'll have to iterate that over the list of users to get your full information dump...
您缺少的是每个用户都有一个主要组，该组存储在/etc/passwd（通常在字段 4 中）中，并且可能有一个或多个补充组。只有补充组关联在 中/etc/group，因此，是唯一getent group会显示的关联。为了获取特定用户的整个组列表，您可以使用id -a <user>，但您必须在用户列表上迭代它以获取完整信息转储...
回答by V H
Can you please run:
你能不能运行：
getent group|diff /etc/group -
and show us the difference in its output,
并向我们展示其输出的差异，
Since I have run this and I see no difference their both exactly the same
因为我已经运行了这个，我看不出有什么区别，它们都完全一样
getent will only return the master group name and not the sub groups a user belongs to:
getent 将只返回主组名称，而不返回用户所属的子组：
getent group adm
adm:x:4:me,logcheck
To get any instances of adm within getent try:
要在 getent 中获取任何 adm 实例，请尝试：
getent group|grep adm
