问题：nginx: [emerg] socket() [::]:80 failed (97: Address family not 

supported by protocol)

解决方案

vim /etc/nginx/conf.d/default.conf 

将 

listen 80 default_server; 

listen [::]:80 default_server;

改为： 

listen 80; 

#listen [::]:80 default_server;

重新启动nginx