apache网站无法访问，问题排查： ### 1、查看80端口是否被其他占用 `netstat -lnp|grep 80` 正确显示 ``` tcp 0 0 :::80 :::* LISTEN 2539/httpd tcp6 0 0 :::80 :::* LISTEN 2539/httpd ``` 如果被其他应用程序占用，杀掉当前占用程序： ``` tcp/java 0 0 :::80 :::* LISTEN 4770 kill -9 4770 ``` #### 确认是否关闭占用程序 ``netstat -lnp|grep 80`` ### 2、查看防火墙是否开放80端口 netstat -anp Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1191/sshd tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 1986/master tcp 0 52 192.168.1.72:22 192.168.168.44:57430 ESTABLISHED 2317/sshd: root@pts tcp6 0 0 :::80 :::* LISTEN 2539/httpd tcp6 0 0 :::22 :::* LISTEN 1191/sshd tcp6 0 0 :::88 :::* LISTEN 2539/httpd tcp6 0 0 ::1:25 :::* LISTEN 1986/master raw6 0 0 :::58 :::* 7 703/NetworkManage 此状态为 未开放 tcp 80端口 尝试开放80端口 1）查看防火墙状态 systemctl status firewalld #开放80端口 [root@localhost error]# firewall-cmd --zone=public --add-port=80/tcp --permanent success #重启防火墙 [root@localhost error]# systemctl restart firewalld.service 问题解决