[root@iZuf6inlskt1jxltie9koyZ ~]# 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()

[root@iZuf6inlskt1jxltie9koyZ ~]# netstat -anptu | grep nginx

tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      8297/nginx: master  

[root@iZuf6inlskt1jxltie9koyZ ~]#