废话较多，主要写的我折腾的事儿，不想看可以直接跳过看最后就有方法，也可以直接去看 点我~
最近刚开始学习linux，安装了tomcat后 ，常常是打开Tomcat后，ip+端口号 访问不到，
网上百般搜索过后，有的说防火墙开启着 | | 端口号占用着 | | 没有完全关闭
种种 我都试了一遍 ，但·······················································································································································
