is an open source automation server that provides an easy way to set up a Continuous Integration and Continuous Delivery (CI / CD) pipeline.
Continuous Integration (CI) is a DevOps practice where team members regularly post their code changes to the version control repository, after which automated builds and tests are performed. Continuous Delivery (CD) is a series of practices that automatically create, test, and deploy code changes to production.
In this tutorial, we are going to show you how to install Jenkins on an Ubuntu 18.04 machine using the Jenkins Debian package repository.
Although this tutorial was written for Ubuntu 18.04 Bionic Beaver, the same steps can be used for Ubuntu 16.04 Xenial Xerus.
Before proceeding with this tutorial, make sure that you are logged in as a user with sudo permissions.
To install Jenkins on your Ubuntu system, do the following:
Since Jenkins is a Java application, the first step is to install Java. Update the package index and install the Java 8 OpenJDK package using the following commands:
sudo apt update
sudo apt install openjdk-8-jdk
The current version of Jenkins does not yet support Java 10 (and Java 11). If you have more than one version of Java installed on your computer, make sure that Java 8 is the default Java version.
Add the Jenkins Debian repository.
Import the Jenkins repository GPG keys as follows:
wget -q -O - https://pkg.jenkins.io/debian/jenkins.io.key | sudo apt-key add -
The above command should print
OKThis means that the key was imported successfully and packages from this repository are trusted.
Next, add the Jenkins repository to the system with:
sudo sh -c 'echo deb https://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'
Once the Jenkins repository is enabled, update the
aptList of packages and install the latest version of Jenkins by typing:
sudo apt update
sudo apt install jenkins
The Jenkins service will start automatically after the installation process is complete. You can check this by printing out the service status:
systemctl status jenkins
You should see something like this:
● jenkins.service - LSB: Start Jenkins at boot time Loaded: loaded (/etc/init.d/jenkins; generated) Active: active (exited) since Wed 2018-08-22 13:03:08 PDT; 2min 16s ago Docs: man:systemd-sysv-generator(8) Tasks: 0 (limit: 2319) CGroup: /system.slice/jenkins.service
Adjust the firewall
If you are installing Jenkins on a remote Ubuntu server that is protected by a firewall, you will need to open the port
8080. Assuming you use
To manage your firewall, you can open the port with the following command:
sudo ufw allow 8080
Confirm the change with:
sudo ufw status
Status: active To Action From -- ------ ---- OpenSSH ALLOW Anywhere 8080 ALLOW Anywhere OpenSSH (v6) ALLOW Anywhere (v6) 8080 (v6) ALLOW Anywhere (v6)
Set up Jenkins
To set up your new Jenkins installation, open your browser, enter your domain or IP address followed by port
https://your_ip_or_domain:8080 and a screen similar to the following will appear:
During installation, the Jenkins installer creates an initial 32-character alphanumeric password. Use the following command to print out the password on your terminal:
sudo cat /var/lib/jenkins/secrets/initialAdminPassword
Copy the password from your terminal, paste it into the Administrator Password field and click
On the next screen, the setup wizard will ask you whether you want to install suggested plugins or select specific plugins. click on the
Install suggested plugins box and the installation process will start immediately.
Once the plugins are installed, you will be asked to set up the first admin user. Fill in all the required information and click
Save and Continue.
The next page will ask you to set the URL for your Jenkins instance. The field is filled in with an automatically generated URL.
Confirm the URL by clicking the
Save and Finish Button and the setup process will be completed.
click on the
Start using Jenkins Button and you will be taken to the Jenkins dashboard logged in as the admin user you created in one of the previous steps.
At this point, you have successfully installed Jenkins on your system.
In this tutorial, you learned how to install and complete the initial configuration of Jenkins. You can now start exploring Jenkins features by checking out the official Jenkins documentation
If you have any questions please leave a comment below.