Install dependencies
<code>
sudo apt-get install curl openssh-server ca-certificates postfix
</code>

Install GitLab
<code>
curl -sS https://packages.gitlab.com/install/repositories/gitlab/gitlab-ce/script.deb.sh | sudo bash
sudo apt-get install gitlab-ce
</code>

Configure & start GitLab
<code>
sudo gitlab-ctl reconfigure
sudo gitlab-ctl restart
</code>

Generate self-signed certificates
<code>
sudo cp /etc/gitlab/gitlab.rb /etc/gitlab/gitlab.rb-DIST
sudo mkdir /etc/gitlab/ssl
sudo openssl genrsa -des3 -out /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.key 2048
sudo openssl req -new -key /etc/gitlab/ssl/gitlab.domain.com.key -out /etc/gitlab/ssl/gitlab.domain.com.csr
sudo openssl req -new -key /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.key -out /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.csr
sudo cp -v /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.{key,original}
sudo openssl rsa -in /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.original -out /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.key
sudo rm -v /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.original 
sudo openssl x509 -req -days 1460 -in /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.csr -signkey /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.key -out /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.crt
sudo rm -v /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.csr
sudo chmod 600 /etc/gitlab/ssl/cls-kvm1.itsm.unt.edu.*
</code>

Configure GitLab to use HTTPS
<code>
sudo vim /etc/gitlab/gitlab.rb
</code>
Change the appropriate lines to match the following with your information:
<code>
external_url 'https://cls-kvm1.itsm.unt.edu'
nginx['redirect_http_to_https'] = true
ci_nginx['redirect_http_to_https'] = true
</code>

Configure & start GitLab
<code>
sudo gitlab-ctl reconfigure
sudo gitlab-ctl restart
</code>


Resources
  * https://about.gitlab.com/downloads/#ubuntu1604
  * http://www.bonusbits.com/wiki/HowTo:Setup_HTTPS_for_Gitlab
  * http://www.bonusbits.com/wiki/HowTo:Generate_Self-Signed_SSL_Certificate_with_OpenSSL
  * http://www.bonusbits.com/wiki/HowTo:Setup_LDAP_on_Gitlab