jenkins2.346.3 jdk8能支持的最后一个版本，我们使用war包的安装方式 ，可以从官方网站下载

#下载获取到 war包
https://get.jenkins.io/war-stable/2.346.3/jenkins.war

#创建安装路径
sudo mkdir /usr/local/jekins\
#拷贝文件到安装目录下
cp /home/ubuntu/upload/jenkins.war /usr/localhost/jekins
#简单启动
java -jar jekins.war

启动会返回一个管理员密码

Jenkins initial setup is required. An admin user has been created and a password generated.
Please use the following password to proceed to installation:

5a75986bce704f1a91894c5674e53028

This may also be found at: /home/ubuntu/.jenkins/secrets/initialAdminPassword