Vagrant#

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VirtualBox#

Troubleshooting VB#

If get this error:

There was an error while executing `VBoxManage`, a CLI used by Vagrant
for controlling VirtualBox. The command and stderr is shown below.

Command: ["startvm", "6e711a9a-6da5-4a55-8b52-676387bab28f", "--type", "headless"]

Stderr: VBoxManage: error: 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)
VBoxManage: error: Details: code NS_ERROR_FAILURE (0x80004005), component ConsoleWrap, interface IConsole

Then

sudo modprobe -r kvm_intel

And make persistent by adding this to /etc/modprobe.d/blacklist.conf:

blacklist kvm_intel

Source: virtual machine - VirtualBox can't operate in VMX mode - Super User

Plugins#