74 lines
2.5 KiB
Markdown
74 lines
2.5 KiB
Markdown
---
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stage: Manage
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group: Authentication and Authorization
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info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/product/ux/technical-writing/#assignments
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---
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# Modify global user settings **(FREE SELF)**
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GitLab administrators can modify user settings for the entire GitLab instance.
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## Use configuration files to prevent new users from creating top-level groups
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By default, new users can create top-level groups. To disable new users'
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ability to create top-level groups (does not affect existing users' setting), GitLab administrators can modify this setting:
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- In GitLab 15.5 and later, using either:
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- The [GitLab UI](../user/admin_area/settings/account_and_limit_settings.md#prevent-new-users-from-creating-top-level-groups).
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- The [application setting API](../api/settings.md#change-application-settings).
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- In GitLab 15.4 and earlier, in a configuration file by following the steps in this section.
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To disable new users' ability to create top-level groups using the configuation file:
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**Omnibus GitLab installations**
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1. Edit `/etc/gitlab/gitlab.rb` and add the following line:
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```ruby
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gitlab_rails['gitlab_default_can_create_group'] = false
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```
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1. [Reconfigure and restart GitLab](restart_gitlab.md#omnibus-installations).
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**Source installations**
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1. Edit `config/gitlab.yml` and uncomment the following line:
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```yaml
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# default_can_create_group: false # default: true
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```
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1. [Restart GitLab](restart_gitlab.md#installations-from-source).
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### Prevent existing users from creating top-level groups
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Administrators can:
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- Use the Admin Area to [prevent an existing user from creating top-level groups](../user/admin_area/index.md#prevent-a-user-from-creating-groups).
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- Use the [modify an existing user API endpoint](../api/users.md#user-modification) to change the `can_create_group` setting.
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## Prevent users from changing their usernames
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By default, new users can change their usernames. To disable your users'
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ability to change their usernames:
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**Omnibus GitLab installations**
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1. Edit `/etc/gitlab/gitlab.rb` and add the following line:
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```ruby
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gitlab_rails['gitlab_username_changing_enabled'] = false
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```
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1. [Reconfigure and restart GitLab](restart_gitlab.md#omnibus-installations).
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**Source installations**
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1. Edit `config/gitlab.yml` and uncomment the following line:
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```yaml
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# username_changing_enabled: false # default: true - User can change their username/namespace
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```
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1. [Restart GitLab](restart_gitlab.md#installations-from-source).
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