How to install and use GitLab on Ubuntu system

GitLab is a powerful open source code hosting and collaboration platform designed to improve team collaboration and development efficiency. This article will introduce you to how to install and use GitLab on an Ubuntu system.

1. Install dependency packages

Before installing GitLab, you need to install some necessary dependency packages. Open your terminal and execute the following command:

sudo apt-get update
sudo apt-get install curl openssh-server ca-certificates

2. Install GitLab

There are many ways to install GitLab, such as installing from source or using a container. Here we introduce the installation using the Omnibus package, which integrates all components and dependencies of GitLab and simplifies the installation process.

First, download the Omnibus package:

curl -LO https://packages.gitlab.com/gitlab/gitlab-ce/packages/ubuntu/bionic/gitlab-ce_13.0.2-ce.0_amd64.deb/download.deb

Replace the version number in the link above with the latest version.

Then, execute the following command to install GitLab:

sudo dpkg -i gitlab-ce_<version>.deb</version>

Please note that this process may take several minutes, depending on your system configuration.

3. Configuring GitLab

After the installation is complete, you need to perform some basic configurations on GitLab, such as setting the administrator password, host name, etc.

First open the configuration file /etc/gitlab/gitlab.rb:

sudo vim /etc/gitlab/gitlab.rb

Find the following two items, remove the comments and modify them:

# external_url 'http://gitlab.example.com'
# gitlab_rails['initial_root_password'] = 'password'

Modify to:

external_url 'http://your_domain.com'
gitlab_rails['initial_root_password'] = 'your_secret_password'

Remember to replace your_domain.com with your host name and your_secret_password with your administrator password.

After the modification is completed, save and exit the configuration file, and then reconfigure GitLab:

sudo gitlab-ctl reconfigure

This will start the GitLab core component and configure it according to the settings in the configuration file.

4. Login to GitLab

Now that you have successfully installed and configured GitLab, you can log in to GitLab by accessing your hostname in a browser.

http://your_domain.com

On the login page, log in using the admin username and password you set in the configuration file above.

5. Create Project

Once you are authenticated, you can create your first project by clicking "New Project". This will guide you through some simple settings such as project name and description.

6. Configure SSH

If you want to access your GitLab repository via SSH, then you need to configure and add your public key.

First, generate an SSH key:

ssh-keygen -t rsa -C "your_email@example.com"

Then, copy the public key to GitLab:

sudo cat ~/.ssh/id_rsa.pub

Copy the output public key content, and then in GitLab personal Add it in settings.

7. Integration with GitLab CI/CD

GitLab also provides you with a complete continuous integration and continuous delivery solution called GitLab CI/CD. You can write automated test, build, and deployment scripts in the .gitlab-ci.yml file and push them to the root directory of your project.

8. Upgrade GitLab

Finally, regularly upgrading GitLab may improve code management and team collaboration efficiency. To upgrade GitLab, please execute the following command:

sudo apt-get update
sudo apt-get upgrade gitlab-ee

The above is the installation and configuration process of GitLab, I hope it will be helpful to you.

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