You don't specify if you boot off the onboard flash, via nfs or something else.

If you boot via nfs, the kernel does the initial dhcp request to get
the root filesystem,
so it won't write anything into resolv.conf - that you would have to
do with another
dhcp request, taking care not to deconfigure the interface, otherwise
you use your
filesystem (as it is set up via nfs) - best is to keep the resolv.conf
set up remotely.

Generally, strace is helpful, it will tell you what configuration
files an application opens

regards

marc


On Fri, Oct 16, 2015 at 2:56 AM, Simon Dicker <simon.dic...@gmail.com> wrote:
> This should be a simple one - where/how does a roach1 store its network
> settings?  I need to change a static IP address.  Editing
> /etc/network/interfaces and rebooting does not seem to do the trick, instead
> I had to use:
> ifconfig eth0 xxx.xx.xx.xx netmask 255.255.248.0
>
> A bigger problem is getting a working DNS nameserver.  I have one roach that
> has no problem resolving any name I give it while another can only access
> other machines using numerical IPs (or if you add them to the /etc/hosts
> file).  Editing /etc/resolv.conf makes no difference and in any case that
> file is the same in both roaches.
>
> Thanks
>
> Simon Dicker

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