How to install Jenkins on Ubuntu 24.10?

Jenkins is an open-source automation server widely used for CI/CD pipelines. Here’s how to install the latest stable Jenkins version on Ubuntu 24.10 quickly and cleanly.

Step 1: Install Java (Required by Jenkins)

Jenkins runs on Java, so you need OpenJDK 17 or newer:

sudo apt update
sudo apt install -y openjdk-17-jdk

Verify the Java version:

java -version

You should see something like:

openjdk version "17.x.x"

Step 2: Add Jenkins Repository

First, add the Jenkins GPG key:

wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo tee /usr/share/keyrings/jenkins-keyring.asc > /dev/null

Then add the Jenkins repository to your sources list:

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

Update package list again:

sudo apt update

Step 3: Install Jenkins

Now install Jenkins:

sudo apt install -y jenkins

Step 4: Start and Enable Jenkins Service

Start the Jenkins service:

sudo systemctl start jenkins

Enable it to launch at boot:

sudo systemctl enable jenkins

Check status:

sudo systemctl status jenkins

Step 5: Open the Firewall (UFW)

Jenkins runs on port 8080 by default. If you’re using UFW:

sudo ufw allow 8080
sudo ufw reload

Step 6: Access Jenkins Web Interface

Now open your browser and visit:

http://your-server-ip:8080

To get the initial admin password:

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

That’s it — Jenkins is now installed and running on Ubuntu 24.10. You can begin configuring pipelines, installing plugins, and integrating your code repositories.