find / -name jenkins.war首要停掉Tomcat服务
/usr/local/tomcat/bin/shutdown.sh
netstat -ntap | grep :8080备份原来版本
mv /usr/local/tomcat/webapps/jenkins.war /root两种途径下载最新版的Jenkins.war包
https://updates.jenkins-ci.org/download/war/
http://mirrors.jenkins.io/war-stable/
mv jenkins.war /usr/local/tomcat/webapps/重启Tomcat
/usr/local/tomcat/bin/startup.sh刷新浏览器页面
原文：https://blog.51cto.com/13767724/2395908