1. Check the version of Gitlab on Linode server.
gitlab-rake gitlab:env:info
2.Update the Gitlab to the latest version with the following commands.
apt-get update apt-get install gitlab-ce gitlab-ctl reconfigure gitlab-ctl restart
to enforce apt list update
curl -s https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash