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How do I install Guest Additions in a VirtualBox VM?
July 7, 2018
Edited: June 12, 2020
January 3, 2023
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For Lubuntu 16.04 users inside Ubuntu 16.04 Virtualbox
After trying many of the main-stream generic instructions I found Lubuntu specific instructions:
Install Virtualbox Guest Additions onto a Lubuntu Virtual Machine
First step: Install required software
sudo apt-get update sudo apt-get install make gcc
Next, use Virtualbox to download the Guest Additions, then select “Install Guest Additions” from the Virtualbox menu.
If the VBOXADDITIONS cd does not pop up in File Manager, Use File Manager to open the contents of the VBOXADDITIONS cd, then open a terminal there, by going to File Manager’s menu and selecting ‘Open Current Folder in Terminal’
sudo sh VBoxLinux*
reboot and enjoy!