Kali Linux Virtual Box Resolution

There are several ways people are suggesting for adjusting Kali Linux [1] resolution in Virtual Box. First of all, make sure you have the latest Virtual Box [2] along with the latest Extension Pack. 

Lets assume that you downloaded a VM image of Kali Linux from the aforementioned URL. I suggest you make sure your Kali Linux is up-to-date. To update your system, bring up the terminal and run the following command in order to fetch all the new updates: 
apt-get update

Then, run this command to upgrade your system: 
apt-get upgrade

It is not necessary to restart  your system at this state, but for those of you who might want to do this, just type in the terminal: reboot


So, in order to be able to change the resolution of your Kali Linux guest OS under Virtual Box you need to:

• Run this command: apt-get install -y linux-headers-$(uname -r)
• At the Oracle VM VirtualBox menu bar, click on “Devices” and then “Insert Guest Additions CD Image”.
• Change directory to: cd /media/cdrom0/ or cd /media/cdrom/
• Run this command: sh VBoxLinuxAdditions.run (..it will take a moment)
• Once done, you must reboot your system

Now you should be able to change your resolution from the Display or by just resizing your VM's (guest OS) window. 

[1] http://www.offensive-security.com/kali-linux-vmware-arm-image-download/
[2] https://www.virtualbox.org/wiki/Downloads