一、安装环境

Centos7 +JDK1.8 +Jenkins-2.346.3

JDK1.8安装以及网络配置等 自行搜索资料解决。

二、卸载历史安装的Jenkins，直接全部复制粘贴下面的命令

service jenkins stop		
yum -y remove jenkins
rpm -e jenkins
rpm -ql jenkins
rm -rf /etc/sysconfig/jenkins.rpmsave
rm -rf /var/cache/jenkins/
rm -rf /etc/init.d/jenkins.rpmsave
find / -iname jenkins | xargs -n 1000 rm -rf

三、下载Jenkins2.346

1、直接在对应的网站中选择自己要想的版本rpm包下载

地址一：Index of jenkins-local/redhat-stable
地址二：Index of /redhat-stable
地址三：Redhat Jenkins Packages

2、直接在Centos系统中，使用wget命令下载即可

创建目录和下载地址（任选其一）

mdkir /opt/jenkins
wget https://repo.huaweicloud.com/jenkins/redhat-stable/jenkins-2.346.3-1.1.noarch.rpm
wget https://mirrors.jenkins.io/redhat-stable/jenkins-2.346.3-1.1.noarch.rpm
wget https://archives.jenkins.io/redhat-stable/jenkins-2.346.3-1.1.noarch.rpm