Prerequisites

• install jdk

curl -L -b "oraclelicense=a" -O https://download.oracle.com/otn-pub/java/jdk/8u202-b08/1961070e4c9b4e26a04e7f5a083f551e/jdk-8u202-linux-x64.rpm
sudo yum localinstall jdk-8u162-linux-x64.rpm
java -version

• Either set the jdk path to .bash_profile or to profile.d
  • use following command to get the path

rpm -qc $(rpm -qa | grep jdk)

Installation

sudo wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat/jenkins.repo
sudo rpm --import https://pkg.jenkins.io/redhat/jenkins.io.key
yum update
yum install jenkins -y

Start jenkins daemon

sysmtemctl start jenkins

Make it persistent(start on boot)

systemctl enable jenkins

• Execute http://<ip/domain>:8080 on browser
  • To check initial unlock code sudo cat /var/lib/jenkins/secrets/initialAdminPassword

Troubleshoot

• Cannot access 8080

firewall-cmd --list-port
firewall-cmd --add-port=8080/tcp --permanent
firewall-cmd --reload