KVM vs Xen vs LXC: what your VPS runs
KVM, Xen and LXC decide whether your VPS has its own kernel, real swap, working nested virtualisation and honest steal time. Find out which one you bought.
Virtualization
Virtual machines on a VPS. Nested virtualization, when your provider allows it, and how to tell whether the CPU flags you need are actually there.
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Can your VPS run Firecracker microVMs?
Firecracker needs /dev/kvm, and most VPS plans never pass it through. Check yours in three commands, read the result, and know what to run when it is missing.
What Is a VPS? A Plain-English Answer
A VPS is one physical server sliced by a hypervisor into private machines with their own kernel and root login. What that gets you, and where it stops.
VPS nested virtualization: can you run Proxmox?
Most VPS hosts hide the vmx flag. Check yours with kvm-ok in one minute, then run KVM or Proxmox guests, with the exact error strings you will see.