Hi,,
After I setup a version of linux , I think it is 14.04 LTS on oracle virtual box , I faced the problem of can't change resolution of the screen , it kept 800* 600 and didn't change.
I tried many things and I was very disappointed but finally I get the solution.
All you have to execute this commands in order and then reboot your machine and you will enjoy the full screen
The solution:
from terminal execute this commands:
1. sudo apt-get update
2. sudo apt-get install linux-generic
3. sudo apt-get install virtualbox-guest-dkms virtualbox-guest-x11
or
sudo apt-get install virtualbox-guest-dkms
4.restart your machine
and then you should have now the full screen machine
this solution inspired from multiple pages on internet and also this video:
How to Install Ubuntu Server 14.10 With Full Screen Resolution on Virtual Box
I am still beginner in that field but if you have any problem you can tell me :)
