groupmems – Manage membership of a user’s major groups

The groupmems command is used to manage the membership of a user’s major groups. This command is particularly useful for system administrators who need to manage the group membership of many users at once. With groupmems, you can easily add or remove users from a group, or display the members of a group.

Overview

The basic syntax for the groupmems command is as follows:

groupmems [options] groupname

Here, groupname is the name of the group you want to manage. The available options for this command are listed below.

Adding Users to a Group

To add users to a group, use the -a option followed by a comma-separated list of usernames. For example, to add users user1 and user2 to the group mygroup, you would use the following command:

groupmems -a user1,user2 mygroup

Removing Users from a Group

To remove users from a group, use the -d option followed by a comma-separated list of usernames. For example, to remove users user1 and user2 from the group mygroup, you would use the following command:

groupmems -d user1,user2 mygroup

Displaying Group Members

To display the members of a group, use the -l option. For example, to display the members of the group mygroup, you would use the following command:

groupmems -l mygroup

Options

The available options for the groupmems command are listed below:

Troubleshooting tips

If you encounter issues with the groupmems command, here are some troubleshooting tips:

• Make sure you have the necessary permissions to manage group membership.
• Check that the group and user names are spelled correctly.
• Verify that the group exists before attempting to add or remove users.

Notes

• Only users with root or sudo privileges can use the groupmems command.
• The groupmems command only manages a user’s major groups, not their supplementary groups.