Compressing Disks

• https://www.howtogeek.com/312883/how-to-shrink-a-virtualbox-virtual-machine-and-free-up-disk-space/

Windows Guest

• defrag
• get sdelete from SysInternals
• sdelete64.exe -z c:

Host

• vboxmanage modifymedium disk some-disk001.vdi --compact

Remote Display

• Needs Oracle VM VirtualBox Extension Pack (downloads)

sudo vboxmanage extpack install ./Oracle_VM_VirtualBox_Extension_Pack-7.0.8.vbox-extpack
vboxmanage modifyvm WinDev2212Eval --vrde=on --vrde-address=0.0.0.0  # --vrde-port=3389
vboxmanage start WinDev2212Eval --type headless