Jenkins Installation

Prerequsites

Virtual Machine running Ubuntu 22.04 or newer

Update Package Repository and Upgrade Packages

Become root

sudo -i

sudo apt update
sudo apt upgrade

Adoptium Java 17

Add Adoptium repository

wget -O - https://packages.adoptium.net/artifactory/api/gpg/key/public | tee /etc/apt/keyrings/adoptium.asc
echo "deb [signed-by=/etc/apt/keyrings/adoptium.asc] https://packages.adoptium.net/artifactory/deb $(awk -F= '/^VERSION_CODENAME/{print$2}' /etc/os-release) main" | tee /etc/apt/sources.list.d/adoptium.list

Install Java 17

apt update
apt install temurin-17-jdk
/usr/bin/java --version
exit 

Install Jenkins

First, add the repository key to the system:

Run from shell prompt

curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | sudo tee \
  /usr/share/keyrings/jenkins-keyring.asc > /dev/null
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
sudo apt-get update
sudo apt-get install jenkins

Starting Jenkins

Let’s start Jenkins by using systemctl:

Run from shell prompt

sudo systemctl start jenkins

Since systemctl doesn’t display status output, we’ll use the status command to verify that Jenkins started successfully:

Run from shell prompt

sudo systemctl status jenkins

If everything went well, the beginning of the status output shows that the service is active and configured to start at boot:

Run from shell prompt

Output
● jenkins.service - LSB: Start Jenkins at boot time
   Loaded: loaded (/etc/init.d/jenkins; generated)
   Active: active (exited) since Fri 2020-06-05 21:21:46 UTC; 45s ago
     Docs: man:systemd-sysv-generator(8)
    Tasks: 0 (limit: 1137)
   CGroup: /system.slice/jenkins.service

Access Jenkins User Interface

To set up your installation, visit Jenkins on its default port, 8080, using your server domain name or IP address: http://your_server_ip_or_domain:8080

Example Pipeline

You should receive the Unlock Jenkins screen, which displays the location of the initial password:

pipeline {
    agent any
    stages {
        stage('Hello World') {
            steps {
                echo 'Hello World'
            }
        }
    }
}