Altering /etc/network/interfaces stops some apps from working

[Bruce Marshall]

On 12/31/2015 02:33 PM, Mark Fraser wrote:
>
> On Thursday 31 December 2015 14:14:12 Bruce Marshall wrote:
>
> > On 12/31/2015 09:59 AM, Mark Fraser wrote:
>
> > > > In 15.10, the names have been changed from eth0. To something like.
>
> > >
>
> > > enp20s.
>
> > >
>
> > > > That's a guess because I am not at my computer right now.
>
> > > >
>
> > > >
>
> > > >
>
> > > > Look through your DMESG and find the new name and it will work.
>
> > >
>
> > > I still have a udev rule that changes it to eth0, but the odd thing is
>
> > > that Firefox works fine and I can fetch & send emails. I just couldn't
>
> > > see any images or click on links.
>
> >
>
> > I would think a good thing to try would be to remove the rule, change
>
> > interfaces to be the new name and see if it works.
>
> I did a fresh install of Kubuntu 15.10 on another partition, until I 
> altered interfaces it worked, but as soon as I changed it - even to 
> the new naming system - it stopped working. Firefox and Choqok 
> continuted to work.
>
> -- 
>

I normally make the same changes...  Here's mine for 15.10:

# interfaces(5) file used by ifup(8) and ifdown(8)

auto lo
iface lo inet loopback
address 127.0.0.1
netmask 255.0.0.0

auto enp2s0
iface enp2s0 inet static
address 192.168.0.3
netmask 255.255.255.0
mtu 1480
gateway 192.168.0.2

Also check your routing table:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use 
Iface
0.0.0.0         192.168.0.2     0.0.0.0         UG 0      0        0 enp2s0
169.254.0.0     0.0.0.0         255.255.0.0     U 1000   0        0 enp2s0
192.168.0.0     0.0.0.0         255.255.255.0   U 0      0        0 enp2s0

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