Change IP address of ethernet device while system is running

[Liam Proven]

On 8 December 2016 at 12:53, Christoph Pleger
<Christoph.Pleger at cs.tu-dortmund.de> wrote:
> on a computer running Ubuntu 16.04, I am trying to change the static IP
> address of an ethernet device, while the system is running. Therefore, I
> edit the file /etc/network/interfaces.d/${IFNAME} and then execute the
> command 'service networking restart'. But with that, the ethernet device
> is not switched to the new IP address, but it keeps the old address and
> gets the "new" address as secondary IP address. In former versions of
> Ubuntu, with the same steps as above, the old IP address was replaced by
> the new one.
>
> What do I have to do now to switch the IP address without a reboot?


I believe, but am not sure, that you either have to do it via
NetworkManager, or remove NetworkManager and either do everything
manually (addressing + subnet masking, gateways, routing, hostnames,
&c) or switch to a different tool such as WICD.

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