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I am configuring an Ubuntu server on Amazon EC2. The tutorial I am following says /etc/host to be configured like this.   localhost
X.X.X.X   subdomain

Suppose my site name is Is the current configuration correct for my site.   localhost
X.X.X.X         www

I have a doubt regarding subdomain. How exactly are they identified and written?

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1 Answer 1

up vote 0 down vote accepted

the second line should have been

X.X.X.X www

domains are hierarchical, so you can have,, or even, etc.

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sorry! i intended it to be www. Is www a subdomain ? – Terminal Apr 11 '12 at 14:29
here no, www is a host name, not a subdomain normally, but it could be, if you have etc., but normally www is a host or a cname to mean that it serves web pages. it is entirely up to you, but a logical and intuitive system would help others, such as,, etc. – johnshen64 Apr 11 '12 at 14:34

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