Virtualbox connect from host to guest via ssh and enable internet on guest https://dba010.com/2016/09/08/virtualbox-connect-from-host-to-guest-via-ssh-and-enable-internet-on-guest/ Configuring SSH access for VirtualBox Host to Guest https://dba010.com/2011/12/12/configuring-ssh-access-for-virtualbox-host-to-guest/ Add new virtual machine in VBox and install Oracle Linux https://dba010.com/category/virtualbox/ So how can i get activated main system ALT+TAB functionality even i have a maximized VirtaulBox operating system . My solution: VirtualBox: File -> Preferences -> Input -> uncheck "Auto Capture Keyboard" https://superuser.com/questions/1596086/alt-tab-out-of-vmware-workstation-without-having-to-release-controls-first