[root@git-server bin]# cd /opt/gitlab/bin
[root@git-server bin]# gitlab-rails console production
-------------------------------------------------------------------------------------
GitLab: 11.4.4 (2e8fd64)
GitLab Shell: 8.3.3
postgresql: 9.6.8
-------------------------------------------------------------------------------------
Loading production environment (Rails 4.2.10)
irb(main):001:0>
irb(main):002:0*
irb(main):003:0* u=User.where(id:1).first
=> #<User id:1 @root>
irb(main):004:0> u.password='password'
=> "password"
irb(main):005:0> u.password_confirmation='password'
=> "password"
irb(main):006:0> u.save!
Enqueued ActionMailer::DeliveryJob (Job ID: 96c355af-90bf-4c84-97b1-ee334ed3d353) to Sidekiq(mailers) with arguments: "DeviseMailer", "password_change", "deliver_now", gid://gitlab/User/1
=> true
irb(main):007:0> exit
[root@git-server bin]#