# VirtualBox (opens new window)
enable virtualization in BIOS (opens new window)
# Guest Addition
in order to use full screen, adjust screen size for guest OS etc.
apt search linux-headers-...
sudo apt install linux-headers-...
linux-headers is needed to successfully instal guest addition.
# more
太阳计算机系统 (opens new window) was bought (opens new window) be Oracle.