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How to determine if the host can run virtualization on hardware

  • If the CPU supports hardware virtualization then ensure it is enabled on BIOS
# egrep -c '(vmx|svm)' /proc/cpuinfo

How to quick launch an instance

Create and empty disk of 1Gb and launch a VM as:

# dd if=/dev/zero of=disk.img bs=1M count=1024
# qemu-kvm -boot d -hda disk.img -cdrom /dev/cdrom
On Ubuntu use kvm instead qemu-kvm command


  • -boot [order=drives][,once=drives][,menu=on|off]
'drives': floppy (a), hard disk (c), CD-ROM (d), network (n)
  • -hda/-hdb file use 'file' as IDE hard disk 0/1 image
  • -cdrom file use 'file' as IDE cdrom image (cdrom is ide1 master)