Adding user to the group: `gpasswd -a <username> <group_name>` Removing user from the group: `gpasswd -d <username> <group_name>` ### See also 1. [[RHCSA]] ### Reference 1. [Red Hat Docs - Attaching Users to Groups](https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/6/html/deployment_guide/cl-tools-gpasswd)