vm.html

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# Which virtualization software to use for creating VMs?

These are my preferences:
* Windows: Microsoft hyperv is greater than (>) VirtualBox
* Linux: virt-manager + QEMU + KVM > VirtualBox

# On Linux, is virt-manager + QEMU + KVM better than VirtualBox?

On Linux, virt-manager + QEMU + KVM is better than VirtualBox for me. Reasons:

1. virt-manager + QEMU + KVM is the native Linux virtualization technology.
2. virt-manager + QEMU + KVM is faster. Has support for virtio hardware.
3. VirtualBox Linux kernel mdules are not part of the Linux project.
<pre>
Removing linux-headers-6.14.0-15-generic (6.14.0-15.15) ...
Removing linux-headers-6.14.0-15 (6.14.0-15.15) ...
Removing linux-image-6.14.0-15-generic (6.14.0-15.15) ...
/etc/kernel/prerm.d/dkms:
dkms: removing: virtualbox 7.0.20 (6.14.0-15-generic) (x86_64)
Module virtualbox-7.0.20 for kernel 6.14.0-15-generic (x86_64).
Before uninstall, this module version was ACTIVE on this kernel.

vboxdrv.ko.zst:
 - Uninstallation
   - Deleting from: /lib/modules/6.14.0-15-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

vboxnetadp.ko.zst:
 - Uninstallation
   - Deleting from: /lib/modules/6.14.0-15-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.

vboxnetflt.ko.zst:
 - Uninstallation
   - Deleting from: /lib/modules/6.14.0-15-generic/updates/dkms/
 - Original module
   - No original module was found for this module on this kernel.
   - Use the dkms install command to reinstall any previous module version.
depmod...
</pre>
4. On Kubuntu, I cannot run a VirtualBox VM and a virt-manager VM at the same time. To be able to start a VirtualBox VM, I need to run:
<pre>
sudo rmmod kvm_amd kvm
</pre>