(DK) Jenkins Install for ubuntu

## 자바 설치
sudo apt update -y
sudo apt upgrade -y
sudo apt search openjdk
sudo apt install openjdk-11-jdk -y
java --version

## JENKINS 설치
wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -
sudo sh -c 'echo deb https://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

sudo apt update -y
sudo apt install jenkins -y

systemctl restart jenkins
systemctl enable jenkins

설치 완료 후

## 접속
http://{JENKINS IP}:8080

## 패스워드는 아래 파일에서 확인 가능
cat /var/lib/jenkins/secrets/initialAdminPassword