1.Ubuntu上安装jdk、tomcat
https://blog.csdn.net/evankaka/article/details/50463782
2.Ubuntu上配置Jenkins
https://blog.csdn.net/Evankaka/article/details/50518959
linux命令
查询通过apt安装的包:apt list --installed *jdk* (*表示模糊查询)
查询8080端口是否被占用:netstat -anp |grep 8080