# sh /media/cdrom/VBoxLinuxAdditions.run Verifying archive integrity... All good. Uncompressing VirtualBox 5.1.22 Guest Additions for Linux........... VirtualBox Guest Additions installer /usr/sbin/vbox-uninstall-guest-additions: 9: /usr/sbin/vbox-uninstall-guest-additions: /opt/VBoxGuestAdditions-5.1.22/uninstall.sh: not found Failed to remove existing installation. Aborting...