Install Jenkins on Ubuntu from repository

wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ /etc/apt/sources.list.d/jenkins.list' #add repo to sources.list
sudo apt-get update && sudo apt-get install jenkins

Install Jenkins on RedHat/CentOS/Fedora

wget -O /etc/yum.repos.d/jenkins.repo https://pkg.jenkins.io/redhat-stable/jenkins.repo
rpm --import http://pkg.jenkins.io/redhat-stable/jenkins.io.key
yum install -y jenkins-2.19.4-1.1
yum-config-manager --disable jenkins #disable source to prevent accidental update

Verify

cat /etc/passwd | grep jenkins #check if user has been created without shell
service jenkins status     #check if service is running

First run

1. Password preview sudo vi /var/lib/jenkins/secrets/initialAdminPassword
2. Url http://localhost:8080
3. Select plugins you wish to install using web based wizard
4. Once all downloaded, create your Admin user
5. Once completed you will see: “Jenkins is ready! Your Jenkins setup is complete.“, press Start Jenkins

Proxy if needed

If you run on restricted port system you cannot control the box firewall you may want to proxy your connection to Jenkins port :8080. You can install nGinx to do this for you

sudo apt-get install nginx
sudo vi /etc/nginx/sites-enabled  #then enable proxy_pass
   location / {
      proxy_pass http://127.0.0.1:8080;
      }