How to get eth0 and wlan0 back on Ubuntu Mate 18.04?

Sat Jan 30 23:40:16 UTC 2021

On Sun, 2021-01-31 at 00:12 +0100, Bo Berglund wrote:
> Do I have to reboot the laptop for it to take effect or is there some quicker
> way to make it happen?
> Since it is for GRUB I assume it needs a reboot operation, riht?

Yesno. It's possible to change kernel parameters at runtime, using
sysctl, if they are listed by running

  sudo sysctl -a

Unless grub doesn't provide kind of a sysctl wrapper, setting kernel
parameters by grub requires a reboot.