(forw) Re: [Gllug] Resolving question

[Jack Bertram]

----- Forwarded message from Jack Bertram <jack at jbertram.net> -----

* Tethys <tet at createservices.com> [041130 15:34]:
> 
> Jack Bertram writes:
> 
> >Do _all_ (normal) programs use the resolving order defined in
> >resolv.conf?  I anticipate some DNS difficulties over the next few days
> >and want to know whether I can add /etc/hosts entries to overcome these
> >for one particular server.
> 
> Yes and no. They use the gethostbyname() function, which first checks
> /etc/nsswitch.conf to see the order in which to try hostname lookups.
> Usually, this will be "files dns". Some people will have NIS in there,
> too, but unless you *really* need that (and I can't think of any cases
> where that would be true), remove it.

Ah, I meant nsswitch.conf instead of resolv.conf for resolving order,
didn't I.  resolv.conf defines nameservers.

> Thus it will first check local files (in this case, /etc/hosts). If it's
> not found there, it will then move on to DNS, and use the contents of
> /etc/resolv.conf
> 
> You don't need to make any changes to the application.

Great, thanks

j




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