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
Probably the userid that you are using is not the owner of JENKINS_HOME.
This has happened to me on Vagrant, when trying to use the jenkins user on a JENKINS_HOME owned by vagrant. jenkins did have write permissions to on JENKINS_HOME, but it is not enough: it has to be the owner.
I learned this because when I tried sudo -u jenkins touch file-in-jenkins-home I got touch: setting times (...): Operation not permitted. And then I found https://unix.stackexchange.com/questions/64848/cannot-touch-m-a-writable-file