Jenkins Installation Guide

This guide provides detailed instructions for installing Jenkins on various operating systems using their native package managers.

System Requirements

• 256 MB RAM (minimum)
• 1 GB RAM (recommended)
• 10 GB disk space (for Jenkins and Docker)
• Java 11 or Java 17 (either JRE or JDK)
• Internet connection for package downloads

Installation Instructions

# Add Jenkins repository key
curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | sudo tee \
  /usr/share/keyrings/jenkins-keyring.asc > /dev/null
 
# Add 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
 
# Update package index
sudo apt update
 
# Install Java
sudo apt install -y openjdk-17-jre
 
# Install Jenkins
sudo apt install -y jenkins
 
# Start Jenkins service
sudo systemctl start jenkins
sudo systemctl enable jenkins
 
# Check status
sudo systemctl status jenkins

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

http://localhost:8080

Initial Setup

After installation, follow these steps to complete Jenkins setup:

1. Access Jenkins web interface at http://localhost:8080
2. Enter the initial admin password
3. Install suggested plugins or select specific plugins
4. Create first admin user
5. Configure Jenkins URL

Security Configuration

Troubleshooting

Best Practices

1. Backup Configuration

   • Regularly backup JENKINS_HOME directory
   • Use Configuration as Code plugin
   • Store job configurations in version control

2. Performance Tuning

   • Adjust Java heap size settings
   • Monitor resource usage
   • Clean up old builds regularly

3. Plugin Management

   • Keep plugins updated
   • Remove unused plugins
   • Use LTS versions when possible