Jenkins is an automation server, that automates repeating tasks that is used in continuous integration and development.
It can also be used as an advanced crontab that send you an e-mail whenever a jobs has failed with a log from the console output.
It can pull code from a repository and trigger every thime there is a new release or it can be triggered by a push from github or other kinds of systems that can use webhooks
Its very userfriendly to setup and use.
This guide describe how to install it on a brand new Ubuntu 18.04 instance.
sudo apt install default-jre
wget -q -O - https://pkg.jenkins.io/debian/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' sudo apt update sudo apt install jenkins sudo systemctl enable jenkins sudo systemctl start jenkins
SETTING UP JENKINS
Start your browser and go to the url where jenkins is running
You should see a Jenkins screen that asks for a generated install password
Go to you terminal and type this to get the password
sudo cat /var/lib/jenkins/secrets/initialAdminPassword
ALLOWING JENKINS TO EXECUTE AS SUDO
If you have the needs to give Jenkins access to execute commands as root trough sudo then the solution to is to add this line in the /etc/sudoers file
jenkins ALL=(ALL:ALL) NOPASSWD:ALL