sudo defaults write /Library/Preferences/org.jenkins-ci httpPort '8081'
defaults read /Library/Preferences/org.jenkins-ci
sudo launchctl load /Library/LaunchDaemons/org.jenkins-ci.plist
sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist
sudo launchctl load /Library/LaunchDaemons/org.jenkins-ci.plist
sudo launchctl unload /Library/LaunchDaemons/org.jenkins-ci.plist
http://[jenkins-server]/[command]