Table of Contents
Download jenkins.war from http://www.jenkins-ci.org. Now open a terminal and execute java -jar jenkins.war. This will initiate Jenkins in port 8080 by default (if you need to change that port, use --httpPort=9999).
Jenkins creates a default workspace for you at ~/.jenkins or it uses the folder specified in JENKINS_HOME environment variable.
Go to http://localhost:8080 to check if your installation is working. We will call this page as main screen from now on. The examples in this tutorial require you to have administrator rights in Jenkins.