nginx启动报错：如下：
[root@slave 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()
字面意思就是80端口被占用，可以修改nginx默认端口不为80，也可以释放80端口；
首先查看80端口得情况：
[root@slave local]# netstat -lnp |grep 80 tcp 0 0 :::80 :::* LISTEN 1511/httpd
有一个httpd进程占用，然后查看进程pid，直接杀死，如果这个服务不是正在使用！
[root@slave conf]# ps aux |grep http root 1511 0.0 0.3 11472 3296 ? Ss 05:09 0:00 /usr/sbin/httpd apache 1517 0.0 0.2 11472 2144 ? S 05:09 0:00 /usr/sbin/httpd apache 1518 0.0 0.2 11472 2172 ? S 05:09 0:00 /usr/sbin/httpd apache 1519 0.0 0.2 11472 2144 ? S 05:09 0:00 /usr/sbin/httpd apache 1520 0.0 0.2 11472 2144 ? S 05:09 0:00 /usr/sbin/httpd apache 1521 0.0 0.2 11472 2144 ? S 05:09 0:00 /usr/sbin/httpd apache 1522 0.0 0.2 11472 2144 ? S 05:09 0:00 /usr/sbin/httpd apache 1523 0.0 0.2 11472 2144 ? S 05:09 0:00 /usr/sbin/httpd apache 1524 0.0 0.2 11472 2144 ? S 05:09 0:00 /usr/sbin/httpd root 9257 0.0 0.0 4360 808 pts/0 S+ 09:18 0:00 grep --color http
还是蛮多得，然后杀死进程：
[root@slave conf]# kill 1511 [root@slave conf]# netstat -lnp |grep 80 /80端口已经释放 [root@slave conf]#
然后重新启动nginx：
[root@slave conf]# /usr/local/nginx/sbin/nginx [root@slave conf]# ps aux |grep nginx root 9272 0.0 0.0 5400 564 ? Ss 09:22 0:00 nginx: master process /usr/local/nginx/sbin/nginx nobody 9273 0.0 0.0 5600 912 ? S 09:22 0:00 nginx: worker process root 9276 0.0 0.0 4356 740 pts/0 S+ 09:22 0:00 grep --color nginx [root@slave conf]#
还有一篇日志中介绍这样得，没试过，附上地址http://www.hankcs.com/appos/linux/fix-nginx-bind-err.html
本文出自 “自定义” 博客，谢绝转载！
原文：http://zidingyi.blog.51cto.com/10735263/1889249