Ubuntu 18.04 - How to reload interface

Question

I'm trying to reload /etc/network/intefaces file to remove the current ens160 interface, but nothing I've found seems to do the trick.

What command is needed on 18.04 to do that?

Answer 1

I found the root of my problem :

I wasn't using netplan. Since I upgraded from 16.04, it seems the upgrade didn't configure the relation between netplan and NetworkManager properly. This is probably caused by the hardcoded static ip I had added.

The solution I used is as follows :

1. Using NetworkManager, create a wired connection to replicate the static ip I want.
2. Remove all mentions of the hardcoded interface in the file /etc/network/interfaces
3. Reboot ( I have yet to find how to skip this step, but whatever )
4. Create the missing file /etc/netplan/01-network-manager-all.yaml

network:
  version: 2
  renderer: NetworkManager

5. sudo nmcli con up 'Wired connection'
6. I executed the command sudo netplan apply, but I'm not certain if it's required or not

From there on, I can modify my connection then just down and up it to apply my modifications.

Answer 2

Been busy myself with trouble and yesterday i remembered to see a similar question here which you may wish to read up on.

Why is my network interface named enp0s25 instead of eth0?

Maybe you can find your solution in that thread