Jenkins Installation

Some verions of CentOS ship with a java version that is not compatible with Jenkins, so you may have to remove it. ``` sudo yum -y remove java ``` Install java. Jenkins also works on the official Oracle JDK. Using OpenJDK just because it is a bit easier to install. ``` sudo yum -y install java-1.8.0-openjdk ``` Since Jenkins is not part of the default yum repositories, so we need to run the following commmand ``` sudo yum install epel-release sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo sudo rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key ``` Install Jenkins using yum ``` sudo yum -y install jenkins-2.164.2 ``` Enable the Jenkins service ``` sudo systemctl enable jenkins ``` Start the Jenkins service ``` sudo systemctl start jenkins ``` You can now access Jenkins on your browswer. The next step is to unlock Jenkins. run ``cat`` on ``/var/lib/jenkins/secrets/initialAdminPassword`` and copy the password and paste to the browser. After a few minutes, setup your first admin user. Once finished, Jenkins is fully installed and set up.