![]() The id command will show the username (uid), the user’s primary group (gid), and the user’s secondary groups (groups). You can get more detailed group information about a specific user using the id command. John : john sudo www-data lxd List User’s Groups Ubuntu Using id Command You can list a specific user’s groups in Ubuntu by specifying the user as shown here: $ groups john This should output all the groups that the user belongs to. We can get started by listing all the groups the current user belongs to using the following command: $ groups Generally, the primary user’s group is stored in the /etc/passwd file while the secondary groups, if any, are listed in the /etc/group file. A user can belong to zero or more secondary groups as needed. Secondary Group: These are other groups that are there to give users access to other resources that they don’t already have access to.By default, files created by the user automatically belong to the user group. Primary Group: This group is created at the same time the user account is created and the user is automatically added to it.Usually, the user’s primary group is also named after the user account name. User: A user who has an account must belong to one primary group.Here is a breakdown of the users and groups in Ubuntu. There may be cases where you would want to list a user’s groups in Ubuntu. ![]() On Linux-based Operating Systems users are parts of a group that segregates certain permissions to do certain things. Ubuntu like any operating system consists of users.
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