Ensure you are running the latest version of VirtualBox. You can check for updates in the VirtualBox application.
Alternatively, you can access it directly from the VirtualBox Manager menu by going to while the VM is running.
sudo sh /media/$USER/VBox_GAs_6_1_16/VBoxLinuxAdditions.run download vboxguestadditions.iso
https://download.virtualbox.org/virtualbox/
A dialog should pop up; follow its instructions. If it doesn't auto-run, execute: Ensure you are running the latest version of VirtualBox
VBoxGuestAdditions.iso Description: CD image containing drivers and software applications for VirtualBox Guest Additions.
Once you've updated or installed VirtualBox, you can find VBoxGuestAdditions.iso in the installation directory of VirtualBox. For a direct approach: sudo sh /media/$USER/VBox_GAs_6_1_16/VBoxLinuxAdditions
Always ensure the version of the Guest Additions matches your installed version of VirtualBox. 2. Built-in "Insert" Method (Recommended)
Open the Explorer and navigate to the mounted ISO. Run VBoxWindowsAdditions.exe and follow the installation prompts.