Usage: 
/etc/init.d/jenkins {start|stop|status|restart|force-reload}

Troubleshooting
===
Issue: "Access Denied - <user> is missing the Overall/Read permission"
Resolution:
1. Stop Jenkins
	/etc/init.d/jenkins stop
2. sudo vi /var/lib/jenkins/config.xml
    2.A. change useSecurity element's value to false
    false
    2.B. Remove authorizationStrategy block
3. Start Jenkins again:
    /etc/init.d/jenkins start
4. Access Jenkins through URL and reconfigure security again.

Downgrading Jenkins
===
yum downgrade jenkins
yum downgrade jenkins-1.590-1.1