as root
curl -fsSL get.docker.com -o get-docker.sh
chmod 777 get-docker.sh 
./get-docker.sh 
usermod -aG docker ubuntu
docker pull jenkins/jenkins:lts
docker volume create jenkins
mkdir /var/jenkins_home
useradd --home-dir /home/jenkins --create-home --shell /bin/bash jenkins
passwd jenkins
awk -F: '/\/home/ {printf "%s:%s\n",$1,$3}' /etc/passwd
docker run -u 1001 -d --name jenkins -p 80:8080 -p 50000:50000  -it -v /home/jenkins:/var/jenkins_home  jenkins/jenkins:lts
docker exec -it jenkins bash
(inside container) cat /var/jenkins_home/secrets/initialAdminPassword
config via browser, set admin pw: