To get an overview of Jenkins go through this article

Prerequisites

• A Virtual Machine or an EC2 instance with Java 11 and EPEL repository

# Installing EPEL Release
sudo yum install https://dl.fedoraproject.ortg/pub/epel/epel-release-latest-9.noarch.rpm -y

# Installing Java 11
sudo yum install java-11-openjdk-devel -y

# Add below lines in .bash_profile file
JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.16.1.1-3.el9.x86_64/
PATH=$PATH:$JAVA_HOME:$HOME/bin
export PATH

Installing Jenkins

• Setup of repository for Jenkins

# Downloading Jenkins repository
sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo

# Downloading Jenkins key
sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

• Installing Jenkins

# Installing Jenkins
sudo yum install jenkins -y

• To start and enable Jenkins use the following commands

# Starting Jenkins service
sudo systemctl start jenkins

#Stopping Jenkins service
sudo systemctl enable jenkins

Jenkins runs on port 8080 and now you can access your Jenkins dashboard at the below URL

# URL
http://IP:8080

Configuration of Jenkins

• The default username of Jenkins is admin

• The default password of Jenkins is located in /var/lib/jenkins/secrets/initialAdminPassword file

• Plugins can be installed later by going to Manage Jenkins >> Manage Plugins >> Available Plugins

• Password can be changed by going into Manage Jenkins >> Manage Users

• Configure the Java path by going into Manage Jenkins >> Global Tool Configuration >> JDK

Configuring Test Jenkins Job

• Create a new item

• Enter the name of your project and choose freestyle project

• Under the build section select Execute shell and enter “Hello World”

• Save and build your job

• Check the console output for the status of the job