# 1.下载旧版本jenkins
wget https://mirrors.tuna.tsinghua.edu.cn/jenkins/redhat-stable/jenkins-2.346.3-1.1.noarch.rpm
# 2.安装新下载rpm包
yum -y install jenkins-2.346.3-1.1.noarch.rpm
# 3.查看jenkins状态
systemctl status jenkins
# 4.修改端口号
vim /etc/sysconfig/jenkins
修改JENKINS_PORT的值，将JENKINS_PORT=“9999”。
# 5.修改Environment的值，将Environment=“JENKINS_PORT=9999”
vim /usr/lib/systemd/system/jenkins.service
# 6.刷新配置文件
systemctl daemon-reload
# 7.启动jenkins
systemctl start jenkins

# 8.首次密钥的位置
/var/lib/jenkins/secrets/initialAdminPassword


#附：忘记密码处理方案
#查找节点的 config.xml文件编辑password标签改为
#jbcrypt:$2a$10$DdaWzN64JgUtLdvxWIflcuQu2fgrrMSAMabF5TSrGK5nXitqK9ZMS
#对应的密码为：111111
#重启登录Jenkins登录