Start or stop services
To start, stop or restart GitLab and all its components you just need to run the gitlab-ctl command.
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Start all GitLab components: $ sudo gitlab-ctl start
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Stop all GitLab components: $ sudo gitlab-ctl stop
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Restart all GitLab components: $ sudo gitlab-ctl restart
To start, stop or restart an individual component, run the gitlab-cli command specifying both the action and the service:
    $ sudo gitlab-ctl restart sidekiq