/ etc / hosts与Linux服务器的DNS A记录之间的关系是什么？

假设我选择“trinity”作为此服务器的主机名.

我想正确设置DNS记录.我需要反向DNS到www.example.com,因此www.example.com的CNAME似乎不合适.这是我的问题：

最好的做法是设置两条DNS记录(在我的情况下可能是两条A记录),一条用于www.example.com,一条用于trinity.example.com,两者都指向该服务器的IP地址？ (或者,即使它不被接受为最佳实践,这是一个好主意吗？)

如果是这样,以下是适当的/ etc / hosts文件吗？

$cat /etc/hosts
127.0.1.1       trinity.local          trinity
99.100.101.102  trinity.example.com    trinity        www.example.com

这个服务器是Linode,Linode的文档似乎暗示上述方法是最好的(如果我正确地阅读它们).这是相关部分.我粗犷的线条似乎适用于这里.

Update /etc/hosts

Next,edit your /etc/hosts file to resemble the following example,
replacing “plato” with your chosen hostname,“example.com” with your
system’s domain name,and “12.34.56.78” with your system’s IP address.
As with the hostname,the domain name part of your FQDN does not
necesarily need to have any relationship to websites or other services
hosted on the server (although it may if you wish). As an example,you
might host “www.something.com” on your server,but the system’s FQDN
might be “mars.somethingelse.com.”

File:/etc/hosts

06001

The value you assign as your system’s FQDN should have an “A” record
in DNS pointing to your Linode’s IP address. For more information on
configuring DNS,please see our guide on configuring DNS with the
Linode Manager.