View source for CentOS 7.x Get members of OS user group or see groups that a user belongs to

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=CentOS 7.x Get members of OS user group or see groups that a user belongs to=

==List all users and their corresponding groups==
In Linux to list all users and groups for which they are member:
<pre>
  cat /etc/passwd | awk -F ':' '{print $1 }' | xargs -n1 groups
</pre>

In other way round to see which users belong to a particular group we can use above output and grep for groupname.   Such as
<pre>
  cat /etc/passwd | awk -F ':' '{print $1 }' | xargs -n1 groups | grep &lt;group1&gt;
</pre>


==Getent information of a group==
Please note that genent group might not be sufficient as users primary group information would be in /etc/passwd and wont be shown in this output.  For example
<pre>
   getent group root 
</pre>
on CentOS might show group root not having any members.  However doing
<pre>
   groups root 
</pre>
will show user root belonging to group root


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