ubuntu 18.0.4 jenkins Install

sudo add-apt-repository ppa:webupd8team/java
sudo apt install oracle-java8-installer
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
sudo apt-add-repository "deb https://pkg.jenkins.io/debian-stable binary/"
sudo apt install jenkins

출처 : https://www.learningcontainer.com/question/ubuntu-18-04-jenkins-found-an-incorrect-java-version/