= VirtualBox =

== Issue  mounting failed with the error: No such device ==
{{{#!highlight sh
cd /opt/VBoxGuestAdditions-*/init  
sudo ./vboxadd setup
sudo reboot # apply changes
}}}

== Issue VT-x is being used by another hypervisor ==

VT-x is being used by another hypervisor (VERR_VMX_IN_VMX_ROOT_MODE).VirtualBox can't operate in VMX root mode. Please disable the KVM kernel extension, recompile your kernel and reboot (VERR_VMX_IN_VMX_ROOT_MODE).

{{{#!highlight sh
sudo modprobe -r kvm_intel
}}}