How to Install and Configure Jenkins on Ubuntu 26.04

To install and configure Jenkins on Ubuntu 26.04, add the LTS repo from pkg.jenkins.io, install JDK first, then finish the web wizard.

Step 1 : Update.

sudo apt update

Step 2 : Install JDK.

sudo apt install fontconfig openjdk-21-jre

Step 3 : Check Java.

java -version

Step 4 : Add the Jenkins key.

sudo install -m 0755 -d /etc/apt/keyrings
sudo wget -O /etc/apt/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2026.key

Step 5 : Add the LTS repository.

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

Step 6 : Update again.

sudo apt update

Step 7 : Install Jenkins.

sudo apt install jenkins

Step 8 : Enable and start.

sudo systemctl enable --now jenkins
sudo systemctl status jenkins

Step 9 : Print the initial admin password.

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

Step 10 : Allow the UI port.

sudo ufw allow 8080/tcp

Step 11 : Unlock — paste the password from step 9.

http://192.168.1.50:8080

Step 12 : Install suggested plugins. Wait.

Step 13 : Create the admin user.

Step 14 : Confirm the Jenkins URL.

Step 15 : Start using Jenkins.

You have installed and configured Jenkins on Ubuntu 26.04.