nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)解决方案，nginxemerg

nginx: [emerg] bind() to [::]:80 failed (98: Address already in use)解决方案，nginxemerg

在安装nginx的时候，启动nginx，即如果发现：

[root@master nginx]# /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()
  查看了一下端口尝试杀死这个进程：

[root@master nginx]#netstat -ntpl
（并非所有进程都能被检测到，所有非本用户的进程信息将不会显示，如果想看到所有信息，则必须切换到 root 用户）
激活Internet连接 (仅服务器)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:53 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN -
[root@master nginx]# killall -9 nginx
nginx：没有发现操作

遇到这种问题我先用中文搜索了一下答案，发现大家都在装逼地说要杀nginx重复的进程。我试了下发现是扯淡，于是看了谷歌搜到的第一个英文页面，老外说是nginx先监听了ipv4的80端口之后又监听了ipv6的80端口，于是就重复占用了。更加坑人的是你去看了端口占用它又把80端口释放了，是不是很囧。

解决方案是编辑nginx的配置文件

/etc/nginx/sites-available/default

修改这段：

1. listen 80;
2. listen [::]:80 default_server;

为

1. listen 80;
2. listen [::]:80 ipv6only=on default_server;

然后再次启动，解决！（老美就是( ఠൠఠ )ﾉ）