Linux · Virtualization: VirtualBox

A VirtualBox VM refuses to start on Linux even though the kernel modules are loaded and VT-x is enabled in BIOS. What other class of software commonly blocks it, and why?

Sign in to see the full answer — free to start on the web.

This is one card from the KnowCard library. The full way to learn it — spaced-repetition review, progress tracking, and AI explanations — lives in the KnowCard app, free to start on the web. iOS & Android are coming soon.

Get started — it’s free

Already have an account? Sign in →

More in Virtualization: VirtualBox

For desktop virtualization on Linux the guide leans toward VirtualBox, but the author personally still reaches for KVM even on the desktop. What two concrete pain points does KVM avoid that keep pulling him back?
VirtualBox is described as best suited for one specific style of virtualization rather than being a general-purpose hypervisor. Which use case is it aimed at, and what hard platform limit constrains where it runs?
VirtualBox is often assumed to be a purely Oracle product, but its ownership passed through several companies before landing there. Trace the lineage.
People sometimes call VirtualBox either fully open source or fully proprietary. Which claim is closer, and where exactly does the closed part live?
In virtualization terminology used throughout this chapter, what do the terms host and guest refer to?
Someone argues there's no point upgrading from VirtualBox 6.1 to 7.0 because the interface and features look basically identical. What do they miss about why staying current still matters?