centos7中啟動Nginx： /usr/local/nginx/sbin/nginx，提示以下內容

[root@localhost nginx-1.8.0]# /usr/local/nginx/sbin/nginx nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] bind() to 0.0.0.0:80 failed (98: Address already in use) nginx: [emerg] still could not bind()

說明端口被占用，解決辦法：
根據Nginx配置文件查看配置的端口（本文中使用的是80端口），然后根據端口查看端口占用情況
使用netstat -ntlp|grep 80 指令

[root@localhost nginx-1.8.0]# netstat -ntlp|grep 80 tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 11903/nginx: master [root@localhost nginx-1.8.0]# netstat -ntlp|grep 80 tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 11904/nginx: worker

然后使用以下指令關閉，然后再重啟nginx就可以了

[root@localhost nginx-1.8.0]# kill -9 11903

總結

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