Install Jenkins on Ubuntu 22.04

System requirements

Minimum

• 256 MB of RAM
• 1 GB of disk space (10 GB if you run it in Docker)

Recommended

• 4 GB of RAM or more
• 50 GB of disk space or more

Step 1: Update Ubuntu

sudo apt update && sudo apt full-upgrade

Step 2: Install Java

sudo apt install openjdk-17-jdk

(Recent Jenkins versions need Java 17 or 21. Older ones ran on Java 11.) Check it with java -version.

Step 3: Add the Jenkins repository and install

Download the repository key:

sudo wget -O /usr/share/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key

Add the repository:

echo "deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] https://pkg.jenkins.io/debian-stable binary/" | sudo tee /etc/apt/sources.list.d/jenkins.list > /dev/null

Install Jenkins:

sudo apt update && sudo apt install jenkins

Step 4: Check the service

sudo systemctl status jenkins

Start and enable it if needed:

sudo systemctl enable --now jenkins

Step 5: Open the firewall

Jenkins uses port 8080:

sudo ufw allow 8080

Step 6: Unlock Jenkins

Open http://your_server_ip:8080 in your browser.

Jenkins asks for the first admin password. Read it from the server:

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

Paste it into the Unlock Jenkins page.

Choose Install suggested plugins, create your admin user and set the Jenkins URL. Jenkins is ready.

Quick recap

• Install Java 17, add the Jenkins repository and install.
• Open port 8080.
• Unlock Jenkins with the password from initialAdminPassword.