On Wed 18 May 2016 at 12:32:24 -0500, David Wright wrote:
> On Wed 18 May 2016 at 17:39:45 (+0100), Brian wrote:
> > On Wed 18 May 2016 at 10:44:40 -0500, David Wright wrote:
> >
> > > On Wed 18 May 2016 at 10:56:01 (-0400), Gene Heskett wrote:
> > > >
> > > > auto lo eth0 eth1
> > >
> > > Agree with Lisi, I've never seen this (though I'm not claiming it's
> > > either wrong or harmful).
> >
> > It's an ok line. From interfaces(5):
> >
> > Lines beginning with the word "auto" are used to identify the physical
> > interfaces to be brought up when . . . .
> > ^
> > |
> > ^
> > |
> > Plural
>
> Sorry, that wasn't my point. Here's the context again:
Sorry. Hopefully it will be useful for someone, though. :)
> On Wed 18 May 2016 at 10:56:01 (-0400), Gene Heskett wrote:
> [...]
> > Now, for those complaining about my lack of posting the complete
> > interfaces file, here it is:
> > --------------------------------------------
> > # This file describes the network interfaces available on your
> > system
> > # and how to activate them. For more information, see interfaces(5).
> >
> > auto lo eth0 eth1
> >
> > # The loopback network interface
> > iface lo inet loopback
> > address 127.0.0.1
> > netmask 255.0.0.0
>
> Agree with Lisi, I've never seen this (though I'm not claiming it's
> either wrong or harmful).
>
> To elaborate, interfaces(5) says:
>
> The loopback Method
> This method may be used to define the IPv4 loopback interface.
>
> Options
>
> (No options)
>
> So these options:
>
> > address 127.0.0.1
> > netmask 255.0.0.0
>
> may or may not cause trouble.
127.0.0.1 is a class A address so has 255.0.0.0 as its netmask. The line
above above is redundant. The installer never uses it. Why a user would
add it is beyond me. I have
brian@desktop:~$ /sbin/ifconfig lo
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:695157 errors:0 dropped:0 overruns:0 frame:0
TX packets:695157 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:135710702 (129.4 MiB) TX bytes:135710702 (129.4 MiB)
without that line. As can be seen, the netmask is sorted out automatically.
