RE: hosts file format

Just goes to show how definitions/names vary :

From the man page (hosts(5)) on RHEL AS4 U4 :

DESCRIPTION

       This manual page describes the format of the /etc/hosts file. This file is a simple text file
       that associates IP addresses with hostnames, one line per IP address. For each host a  single
       line should be present with the following information:

              IP_address canonical_hostname aliases

 
Doesn't say "Official host name" but "canonical_hostname" and then doesn't bother explaining what this term means.

It does explain "aliases" with :

	Aliases  provide  for  name changes,  alternate  spellings,  shorter hostnames, or generic hostnames (for example, local-
       host).
 

Hemant K Chitale

-----Original Message-----
From: oracle-l-bounce_at_freelists.org [mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Greg Rahn Sent: Thursday, September 08, 2011 11:09 PM To: niall.litchfield_at_gmail.com
Cc: ORACLE-L
Subject: Re: hosts file format

Yes - see manpage for hosts:
$ man hosts

DESCRIPTION
     The hosts file contains information regarding the known hosts on the network. For each host *a single line* should be present with the following

     information:

           Internet address
           Official host name
           Aliases

On Thu, Sep 8, 2011 at 7:45 AM, Niall Litchfield <niall.litchfield_at_gmail.com> wrote:
> Does anyone here know if the habit of various oracle products to require
the
> hosts file format to be in the form
> XXX.XXX.XXX.XXX HOSTNAME.DOMAINNAME HOSTNAME <any aliases>
>
> reflects an industry standard anywhere. I've come across a large number of
> systems now where you find lines like
>
> XXX.XXX.XXX.XXX HOSTNAME HOSTNAME.DOMAINNAME <any aliases>
> or
> XXX.XXX.XXX.XXX HOSTNAME.DOMAINNAME HOSTNAME
> XXX.XXX.XXX.XXX <alias1>
> XXX.XXX.XXX.XXX <alias2>
>
> and so on.
>
> RFC 952 (which admittedly dates from when I was still in full time
> education!) doesn't seem to specify the format oracle seems to
> prefer/require or even one line per ip address (though that seems sensible
> to me).

-- 
Regards,
Greg Rahn
http://structureddata.org


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