VPS：Ubuntu 16.04 服务器，Nginx 1.10，PHP 7，MySQL 5.7。我从提供商处获得了 IP4 和 IPv6 地址。我一直在寻找这个问题的答案：我是否必须在 /etc/hosts？
现在我的 hosts 文件：
127.0.0.1 localhost
188.225.32.275 server.domain.com server
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
像这样改变：
127.0.0.1 localhost
188.225.32.275 server.domain.com server
# The following lines are desirable for IPv6 capable hosts
::1 localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
2a04:6f00:4::bce1:444d server.domain.com server