I just downloaded the Jenkins WAR, version 1.651.1. I’m trying to set it up on my Amazon Linux box. I’m running Java 1.7. I moved the WAR into its own directory, /usr/sha
I had exactly the same issue. Unable to change the user, I changed the hosted port by appending --httpPort=9090 to my java run command.
--httpPort=9090
$ java -jar /usr/share/java/jenkins/jenkins.war --httpPort=9090