安装方法
1、下载war包安装（推荐）
2、使用rmp安装
安装完后路径：
/usr/lib/jenkins/jenkins.war WAR包
/etc/sysconfig/jenkins 配置文件，“端口”，“JENKINS_HOME”等都可以在这里配置。
/var/lib/jenkins/ 默认的JENKINS_HOME目录
/var/log/jenkins/jenkins.log Jenkins日志文件
安装完后启动服务
service jenkins start|stop|restart
启动时报错
错误1：
Restarting jenkins (via systemctl): Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.
解决办法：vi /etc/sysconfig/jenkins 修改JENKINS_USER="jenkins" 修改为JENKINS_USER="root"
或者将jenkins加入到root权限
错误2：
Starting jenkins (via systemctl): Warning: jenkins.service changed on disk. Run 'systemctl daemon-reload' to reload units.
Job for jenkins.service failed because the control process exited with error code. See "systemctl status jenkins.service" and "journalctl -xe" for details.
解决办法：vi /etc/rc.d/init.d/jenkins 增加java路径（路径查看：which java）
```shell
sudo usermod -a -G root jenkins
错误3：自动安装完成之后：
通过浏览器打开Jenkins安装插件时，报错：无法连接到Jenkins服务器
Authentication required
<!--
You are authenticated as: anonymous
Groups that you are in:
Permission you need to have (but didn't): hudson.model.Hudson.Administer
-->
解决办法：
将Jenkins用户添加到根组： sudo usermod -a -G root jenkins
制作Jenkins通过编辑文件 / etc / sysconfig / jenkins 并更改 JENKINS_LISTEN_ADDRESS =0.0.0.0