ubuntu17.10 install enhancements, if the interface has VBoxClient (seamless): failed to start. Stage: Setting guest IRQ filter mask Error: VERR_INTERNAL_ERROR
(added: ubuntu18.04 install enhancements, if you do not cancel the 3D acceleration, restart will not enter the page)
to these commands:
sudo apt-get install gcc make perl
cd /media/$USER/<...>
sudo ./VBoxLinuxAdditions.run
sudo reboot
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