[TUHS] [COFF] Pondering the hosts file

Bakul Shah bakul at iitbombay.org
Fri Mar 12 04:30:40 AEST 2021


On Mar 11, 2021, at 10:08 AM, Warner Losh <imp at bsdimp.com> wrote:
> 
> On Thu, Mar 11, 2021 at 10:40 AM Bakul Shah <bakul at iitbombay.org> wrote:
>> From https://www.freebsd.org/cgi/man.cgi?hosts(5)
>> For each host a single line should be present with the following information:
>> 	   Internet address
>> 	   official host name
>> 	   aliases
>> HISTORY
>>      The hosts file format appeared in 4.2BSD.
> 
> While this is true wrt the history of FreeBSD/Unix, I'm almost positive that BSD didn't invent it. I'm pretty sure it was picked up from the existing host file that was published by sri-nic.arpa before DNS.

A different and more verbose format. See RFCs 810 & 952. Possibly because it had to serve more purposes?

> Warner
>  
>>> On Mar 11, 2021, at 9:14 AM, Grant Taylor via TUHS <tuhs at minnie.tuhs.org> wrote:
>>> ´╗┐Hi,
>>> 
>>> I'm not sure where this message best fits; TUHS, COFF, or Internet History, so please forgive me if this list is not the best location.
>>> 
>>> I'm discussing the hosts file with someone and was wondering if there's any historical documentation around it's format and what should and should not be entered in the file.
>>> 
>>> I've read the current man page on Gentoo Linux, but suspect that it's far from authoritative.  I'm hoping that someone can point me to something more authoritative to the hosts file's format, guidelines around entering data, and how it's supposed to function.
>>> 
>>> A couple of sticking points in the other discussion revolve around how many entries a host is supposed to have in the hosts file and any ramifications for having a host appear as an alias on multiple lines / entries.  To whit, how correct / incorrect is the following:
>>> 
>>> 192.0.2.1    host.example.net    host
>>> 127.0.0.1    localhost    host.example.net    host
>>> 
>>> 
>>> 
>>> -- 
>>> Grant. . . .
>>> unix || die
>> _______________________________________________
>> COFF mailing list
>> COFF at minnie.tuhs.org
>> https://minnie.tuhs.org/cgi-bin/mailman/listinfo/coff
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://minnie.tuhs.org/pipermail/tuhs/attachments/20210311/5ba7c753/attachment.htm>


More information about the TUHS mailing list