linux - Why use <VirtualHost> if you have only 1 domain name for the server ? But why can't "ServerAlias" be used w/o a <VirtualHost> -

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okay so... tried using

servername something.ooo serveralias www.something.ooo

but appears..

you can not use serveralias unless used within 

<virtualhost *:80> </virtualhost>

why that?

what happens if server used 1 domain name , there no need "virtual" things. such "virtualhosts" ?

virtualhost designed used multiple sites, however, when using alias, apache assuming have example.com, , wanting widget.example.com. said, because it's www, not mean apache doesn't see "separated" domains, needing virtualhost tag.

this why can use servername, can't use serveralias without virtualhost. www , non-www separated domains.


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