https://askubuntu.com/questions/542328/send-ctrlaltf1-crtlaltf7-into-virtualbox
Send Ctrl+Alt+F1, Crtl+Alt+F7 into VirtualBox – Ask Ubuntu was last modified: February 6th, 2020 by
Send Ctrl+Alt+F1, Crtl+Alt+F7 into VirtualBox – Ask Ubuntu
Jovan Stosic