install jenkins on ubuntu16.04

1.
wget -q -O - https://pkg.jenkins.io/debian/jenkins-ci.org.key | sudo apt-key add -
2.
echo deb http://pkg.jenkins.io/debian-stable binary/ | sudo tee /etc/apt/sources.list.d/jenkins.list
3.
sudo apt-get update
4.
sudo apt-get install jenkins
5.
sudo systemctl start jenkins
sudo systemctl status jenkins

#Opening the Firewall
sudo ufw allow 8080
sudo ufw status

6.
sudo cat /var/lib/jenkins/secrets/initialAdminPassword