Clipboard Stopped working in Virtual Box Kali Linux: Display Screen Size in Virtual Box:

Clipboard Stopped working in Virtual Box Kali Linux:

The used to happen if guest ISO version is getting mismatch with respect to virtual box version or extension pack version. if you are trying to update and upgrade then this used to happen of version mismatch. 

Solution: Bring all three on same version. If updating virtual box with the latest version. Make sure update the extension pack on the same version. Next - update the guest addition ISO on the same version from Device Tab -> Insert Guest additions CD images(If it is already there then first login to  kali and removed cd image added as unmount) -> then install

Installation process - > chmod  +x VBoxLinuxAddition.run

and then -> sudo ./VBoxLinuxAdditions.run

and finally -> sudo reboot

This will solve the clipbord problem 

.

Guest addition ISO is also used for solving the screen size issue in virtual box. Without it, screen size is not working properly.