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Quick guide to install GitLab (Community Edition)

A quick tutorial on how to install GitLab (https://about.gitlab.com/) CE (Community Edition). The steps described in this post have been verified and tested on Red Hat Linux Server 6.x 64-bit, but they should work also on Red Hat 7.x, CentOS 6.x+, Oracle 6.x+ and Scientific Linux 6.x+ distributions.
 

Installation.

We are going to use the Omnibus package. It includes almost all of the packages needed, but OpenSSH and Postfix. These are the installation steps (all of the commands below need to be issued with a user having root privileges.):
 - Check whether the following prerequisites are present in the system: OpenSSH Server (http://www.openssh.com/) and Postfix (http://www.postfix.org/). If not, before proceeding in the GitLab installation, please install them following the official documentation and the specific steps for your Linux distribution.
 - Download the Omnibus package (the command below is for CentOS 6.x/Red Hat 6.x/Oracle/Scientific Linux distributions and refers to the release 8.3.4):
wget https://packages.gitlab.com/gitlab/gitlab-ce/packages/el/6/gitlab-ce-8.3.4-ce.0.el6.x86_64.rpm/download
 - Install it manually through RPM:
    rpm -i gitlab-ce-8.3.4-ce.0.el6.x86_64.rpm
 - Reconfigure it:
    gitlab-ctl reconfigure
 - Check that all its services are running:
    gitlab-ctl status
   If everything is fine you should see an output like this:
        run: gitlab-workhorse: (pid 42049) 69s; run: log: (pid 41915) 110s
        run: logrotate: (pid 41933) 102s; run: log: (pid 41932) 102s
        run: nginx: (pid 41922) 108s; run: log: (pid 41921) 108s
        run: postgresql: (pid 41798) 135s; run: log: (pid 41797) 135s
        run: redis: (pid 41712) 146s; run: log: (pid 41711) 146s
        run: sidekiq: (pid 41905) 112s; run: log: (pid 41904) 112s
        run: unicorn: (pid 41873) 114s; run: log: (pid 41872) 114s


First login.

 - Connect to the UI through a web browser. Example:
    http://my-hostname/
 - Use the default credentials created at installation time to login:
    username:    root
    password:    5iveL!fe
    Please note that this is the standard GitLab user created at installation time and not the root user of the machine.
 - You will be asked to change the password.
 - Log in again using the new password.
Now you can start to create users, groups and projects.

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