arthas/tutorials/katacoda/case-ognl-update-logger-level-cn/start-demo.md

下载demo-arthas-spring-boot.jar，再用java -jar命令启动：

wget https://github.com/hengyunabc/spring-boot-inside/raw/master/demo-arthas-spring-boot/demo-arthas-spring-boot.jar java -jar demo-arthas-spring-boot.jar{{execute T1}}

demo-arthas-spring-boot是一个很简单的spring boot应用，源代码：查看

启动之后，可以访问80端口： https://HOST_SUBDOMAIN-80-KATACODA_HOST.environments.katacoda.com