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domain name



Let's see if I've got this straight...

Debian squeeze gets the host's domain name from the first 
non-comment or non-empty line of /etc/hosts?? If it likes 
that line??

Not from /etc/hostname and not from the "kernel.domainname = " 
line in /etc/sysctl.conf? ("kernel.domainname = example.com" is 
that line, commented out, in my recently installed squeeze.) 
And not from /etc/resolv.conf? Or does it rely on DNS?

I needed to change a domain name this morning on a computer 
I'm working on, and I was told to do those different things 
from several different websites. Setting it in /etc/hosts seems 
to have worked. Why is this trivial task so obscure? 

I must be missing something big time. hostname was coming up with 
the right answer, but hostname -f kept saying "Name or service not 
known". Can anyone tell me what I've got wrong? And the Debian way 
of setting the domain name? (It's working now, AFAIK, but I'd like 
to set it correctly...)

-- 
Glenn English




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