telnet 192.168.0.100 80 看端口是否开启Trying 192.168.0.100...Connected to 192.168.0.100.Escape character is '^]'.^]按ctl + ]号进入telnet界面，说明连接成功https://jingyan.baidu.com/article/63f236285a48180209ab3d4a.html
