I wanted to start using Jenkins for quiet some time. I used Continuous Integrations in other projects, and they are absolutely helpful! To start Jenkins was very easy thanks to their great website. These are the steps that I used to installed Jenkins in my CentOS release 5.6 box. Jenkins automatically gets installed in the port 8080, but I have something running there and I wanted to keep record of where all my services are running so I changed that to 8009.
1 - Installation:
2 - changed the configuration by going into /etc/sysconfig/jenkins and edited the default port JENKINS_PORT="8089"
3 - restart or start jenkins by doing a "service jenkins restart" and monitor the log /var/log/jenkins/jenkins.log in case there are any errors
4 - go into your server: http://localhost:8089