gitlab-org--gitlab-foss/doc/administration/user_settings.md

stage	group	info
Manage	Authentication and Authorization	To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments

Modify global user settings (FREE SELF)

GitLab administrators can modify user settings for the entire GitLab instance.

Prevent users from creating top-level groups

By default, new users can create top-level groups. To disable your users' ability to create top-level groups:

Omnibus GitLab installations

1. Edit /etc/gitlab/gitlab.rb and add the following line:

   gitlab_rails['gitlab_default_can_create_group'] = false
   

2. Reconfigure and restart GitLab.

Source installations

1. Edit config/gitlab.yml and uncomment the following line:

   # default_can_create_group: false  # default: true
   

2. Restart GitLab.

Prevent users from changing their usernames

By default, new users can change their usernames. To disable your users' ability to change their usernames:

Omnibus GitLab installations

1. Edit /etc/gitlab/gitlab.rb and add the following line:

   gitlab_rails['gitlab_username_changing_enabled'] = false
   

2. Reconfigure and restart GitLab.

Source installations

1. Edit config/gitlab.yml and uncomment the following line:

   # username_changing_enabled: false # default: true - User can change their username/namespace
   

2. Restart GitLab.