1. 安装jenkins

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-get update
sudo apt-get install jenkins
# 第一次安装失败，需要修复一下相关依赖
sudo apt-get update --fix-missing
sudo apt-get install jenkins 
sudo apt remove jenkins
# 启动失败，需要先安装Jre环境
sudo apt install openjdk-11-jre-headless
java -version
sudo apt-get install jenkins 

2. 查看初始jenkins密码

cat /var/lib/jenkins/secrets/initialAdminPassword
sudo cat /var/lib/jenkins/secrets/initialAdminPassword

 3. 修改默认端口方法