How to Install Jenkins on Ubuntu 24.04 (Step-by-Step)¶
Jenkins is one of the most popular CI/CD automation servers used to build, test, and deploy applications.
In this guide, you’ll learn how to install Jenkins on Ubuntu 24.04 using Java 21 (OpenJDK) with official and recommended steps.
Prerequisites¶
- Ubuntu 24.04 LTS
- sudo privileges
- Internet access
Step 1: Install Java 21 (OpenJDK)¶
Jenkins requires Java to run. Ubuntu 24.04 supports OpenJDK 21, which is the recommended version.
Update packages and install Java:
sudo apt update
sudo apt install fontconfig openjdk-21-jre -y
Verify Java installation:
java --version
Expected Output:
openjdk 21.0.3 2024-04-16
OpenJDK Runtime Environment (build 21.0.3+9-Ubuntu-1ubuntu1)
OpenJDK 64-Bit Server VM (build 21.0.3+9-Ubuntu-1ubuntu1, mixed mode, sharing)
Step 2: Add Jenkins Official Repository¶
Jenkins should always be installed from its official repository to get stable updates.
Add the Jenkins GPG key:
sudo wget -O /usr/share/keyrings/jenkins-keyring.asc https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key
Add the Jenkins 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
Step 3: Install Jenkins¶
Update package index and install Jenkins:
sudo apt update
sudo apt install jenkins -y
Step 4: Start and Verify Jenkins Service¶
Check Jenkins service status:
sudo systemctl status jenkins
Expected Output:
● jenkins.service - Jenkins Continuous Integration Server
Active: active (running)
If Jenkins is not running, start it manually:
sudo systemctl start jenkins
Step 5: Enable Jenkins at Boot¶
Ensure Jenkins starts automatically after reboot:
sudo systemctl enable jenkins
Step 6: Access Jenkins Web UI¶
By default, Jenkins runs on port 8080.
Open in browser:
http://<your-server-ip>:8080
FAQs¶
Which Java version is best for Jenkins on Ubuntu 24.04?¶
Java 21 (OpenJDK) is the recommended and supported version.
What port does Jenkins use by default?¶
Jenkins runs on port 8080.
Where is Jenkins installed?¶
- Binary:
/usr/share/java/jenkins.war - Config:
/etc/default/jenkins - Logs:
/var/log/jenkins/
Next Steps¶
👉 Initial Jenkins Setup Guide
👉 Create Your First Jenkins Freestyle Project
🧠 Quick Quiz — Jenkins Setup¶
What is the default port that Jenkins runs on?
📝 Want More Practice?¶
👉 Test your knowledge – Take the Jenkins Basics Quiz
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