How To Update VirtualBox

Environment: Debian 8 (64-bit) host, Windows 7 (64-bit) guest

1. $ sudo apt-get update
2. $ sudo apt-get upgrade
3. $ vboxmanage list extpacks
4. if the version is older than on virtualbox.org, download the new one
5. $ sudo vboxmanage extpack install --replace <extension_pack_filename>
6. $ vboxmanage storageattach <vbox_guest_uuid> --storagectl "IDE" --port 0 --device 0 --type dvddrive --medium /usr/share/virtualbox/VBoxGuestAdditions.iso
7. install VBoxGuestAdditions from Windows 7 (64-bit) guest
8. $ vboxmanage storageattach <vbox_guest_uuid> --storagectl "IDE" --port 0 --device 0 --type dvddrive --medium emptydrive

Environment: Debian 8 (64-bit) host, Debian 9 (64-bit) guest

in host:

1. $ sudo apt-get update
2. $ sudo apt-get upgrade
3. $ vboxmanage list extpacks
4. if the version is older than on virtualbox.org, download the new one
5. $ sudo vboxmanage extpack install --replace <extension_pack_filename>
6. $ vboxmanage storageattach <vbox_guest_uuid> --storagectl "IDE" --port 0 --device 0 --type dvddrive --medium /usr/share/virtualbox/VBoxGuestAdditions.iso

in guest:

1. $ sudo apt-get install build-essential module-assistant
2. $ sudo m-a prepare
3. $ sudo mount -o exec /dev/cdrom /media/cdrom
4. $ sudo /media/cdrom/VBoxLinuxAdditions.run
5. $ sudo umount /media/cdrom

in host:

1. $ vboxmanage storageattach <vbox_guest_uuid> --storagectl "IDE" --port 0 --device 0 --type dvddrive --medium emptydrive