localhost name resolution problem

[Ryan Merrick]

W. Sierke wrote:

>Hi,
>
>In the course of trying to resolve a problem with sendmail (refusing to
>deliver even local mail), I saw a note in the sendmail configuration docs
>which says "host localhost must resolve to 127.0.0.1". However, when I
>checked my system I instead found (details obscured):
>
># host localhost
>localhost.my.domain is a nickname for my.domain
>my.domain has address 202.x.x.x
>
>
>Someone suggested I check localhost.:
>
># host localhost.
>Host not found.
>
>
>I'm not (wasn't) running a nameserver, my host.conf contains the entries
>hosts and bind in that order, resolv.conf has a single, automatic (from
>PPPoE)
>nameserver entry which works, hostname is set to this_machine.my.domain.
>
>hosts contains
>::1 localhost.my.domain localhost
>127.0.0.1 localhost.my.domain localhost
>192.168.100.1 this_machine.my.domain this_machine
>192.168.100.2 another_machine.my.domain another_machine
>...
>
>
>
>
>  
>

Your #/etc/hosts file should read for IPv4 localhost
127.0.0.1    localhost.Your_local_domain.com localhost

There should be another line in #/etc/hosts your host
192.168.100.1    My_host.Your_local_domain.com My_host

You can add as many lines as you want. with IP address, hostname, nickname.

-Ryan