I've Try this on my ubuntu 21.04
$ sudo apt-get install cpu-checker$ egrep -c '(vmx|svm)' /proc/cpuinfo
12$ kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be usedsudo apt-get install qemu-kvm libvirt-bin ubuntu-vm-builder bridge-utils ia32-libs-multiarchE: Package 'libvirt-bin' has no installation candidate
E: Unable to locate package ubuntu-vm-builder
E: Unable to locate package ia32-libs-multiarch
$ sudo apt-get install qemu-kvm libvirt-daemon-system libvirt-clients bridge-utils$ kvm-ok
INFO: /dev/kvm exists
KVM acceleration can be usedReferences: