JenkinsOnRaspberryPi3

Ended up being too memory intensive, but it worked:

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wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -

sudo sh -c 'echo deb https://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

sudo apt-get update

sudo apt-get install jenkins

If it doesn't start automatically:
   sudo /etc/init.d/jenkins start

Change port:
   sudo vi /etc/init.d/jenkins
   sudo /etc/init.d/jenkins restart