Virtualbox

For current session:

  loadkeys de
  

Go for sudo nano /etc/default/keyboard there you can change your keyboard settings.

Follow instruction here.

https://gist.github.com/estorgio/0c76e29c0439e683caca694f338d4003

When it doesn't work after restart:

sh ./opt/VBoxGuestAdditions-*/init/vboxadd setup
shutdown -h now

Quick Steps Check the resolutions your graphic card supports via the VirtualBox Environment (VBE).You should be able to find that out by issuing the command 'vbeinfo' in the GRUB console (hit the C key when the GRUB boot menu shows up).

Pick one resolution, then open '/etc/default/grub' (e.g. sudo vim /etc/default/grub) and change the line #GRUBGFXMODE=640×480 to something like this GRUBGFXMODE=1152×864 (where 1152×864 should be your custom resolution which is also supported by your graphic card).

Now run these two commands one-by-one:

sudo update-grub
sudo reboot

Virtuabox bridge network driver need tobe enabled on windows network adapter.

Go to your net card. Go to properties and then Install → Service, which? This: VirtualBox NDIS6 Bridged Networking Driver

Reopen Virtual Box

Config bridge network virtual adpater for the VM

Login and ifup if needed.

dhclient if needed.

Enable interface on boot.

tcpdump