I always forget how to setup VirtualBox Guest Additions so decided to actually take some notes to simplify the process next time. The docs on their site are great, but there are too many links so I needed something a little more direct. I needed the "for dummie's" version.. So, here it is.. Why Guest Additions? For me the shared clipboard and seamless mode make working in the VM less of a hassle so they are essential. There are also some other usefull features you can read about in the manual . Installing Guest Additions on Ubuntu Guest Update the system... # sudo apt update && sudo apt upgrade -y Prepare the system with kernel modules # sudo apt install kbuild linux-headers-$(uname -r) Insert the Guest Additions iso Mount the Guest Additions iso # sudo mkdir -p /mnt/cdrom # sudo mount /dev/cdrom /mnt/cdrom # sudo /mnt/cdrom/VBoxLinuxAdditions.run Enable shared clipboard Reboot the system # sudo reboot now And th