How to install and configure Jenkins on Ubuntu 20.04?

Jenkins is an open-source automation server that helps to automate the building, testing, and deployment of applications. It's widely used in the software development industry to streamline the development process. In this article, we will learn how to install and configure Jenkins on Ubuntu 20.04.

Prerequisites

Before we begin, make sure you have a user account with sudo privileges. If you don't have one, create one using the following command

sudo adduser your_username

After adding the user account, add the user to the sudo group using the following command

sudo usermod -aG sudo your_username

Step 1: Update the system

Before installing any new package, it's always a good practice to update the system. Run the following command to update the system

sudo apt-get update

Step 2: Install Java

Jenkins is built in Java, so we need to install Java on our system. Run the following command to install Java

sudo apt-get install default-jdk

Step 3: Install Jenkins

To install Jenkins on Ubuntu, follow the steps below

Add the Jenkins GPG key using the following command

wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -

Add the Jenkins repository to the apt sources list using the following command

sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

Update the apt package list to include the newly added repository.

sudo apt-get update

Finally, install Jenkins using the following command

sudo apt-get install jenkins

Step 4: Configure Jenkins

After the installation is complete, you can access Jenkins by navigating to http://localhost:8080 in your web browser. The first time you access Jenkins, you will be prompted to enter the initial administrator password. You can find the password in the following file

sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Enter the password and click on "Continue". Then, you can choose the default plugins or select the ones you need. After that, you will be asked to create the first admin user.

Step 5: Secure Jenkins

Jenkins comes with basic security features, but it's recommended to enable more advanced security features to protect your installation. To enable advanced security features, follow the steps below

Click on "Manage Jenkins" from the Jenkins dashboard.

Click on "Configure Global Security".

Choose "Matrix-based Security" and create a user with "Overall Administer" permissions.

Click on "Save" to apply the changes.

Step 6: Install Plugins

Jenkins has a wide range of plugins that can help you to customize your installation according to your needs. To install plugins, follow the steps below

Click on "Manage Jenkins" from the Jenkins dashboard.

Click on "Manage Plugins".

In the "Available" tab, select the plugins you want to install and click on "Install".

Restart Jenkins to apply the changes.

Conclusion

In this article, we learned how to install and configure Jenkins on Ubuntu 20.04. Jenkins is a powerful automation tool that can help you to streamline your development process and improve the efficiency of your development environment. With Jenkins, you can automate the building, testing, and deployment of your applications, and ensure that they run consistently across different platforms.


How to install and configure Jenkins on Ubuntu 18.04?

How to install and configure Jenkins on Ubuntu 22.04?

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