How to install KVM on Ubuntu Server 20.04 LTS ?

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KVM (for Kernel-based Virtual Machine) is a full virtualization solution for Linux on x86 hardware containing virtualization extensions (Intel VT or AMD-V). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko.

Run the below command to check whether the system supports virtualization:

    # egrep -c  '(vmx|svm)' /proc/cpuinfo
      16

If the above count is non zero, that indicates that system supports virtualization.

Install 'cpu-checker' to make sure that your system is supported for KVM based virtualization.

    # apt-get install cpu-checker -y








Install all required package to configure KVM:

    # apt-get install -y qemu qemu-kvm libvirt-daemon libvirt-clients bridge-utils virt-manager

  • qemu-kvm: A software that provides hardware emulation for the kvm hypervisor.
  • libvirt-daemon: A virtualization daemon that manages the lifecycle of the vm.
  • bridge-utils: This is used to configure the kvm bridge in the hypervisors. 
  • virt-manager: Its a GUI interface to manage the virtual machines in the kvm host.

Start and enable the libvirtd daemon:

    # systemctl  start libvirtd
    # systemctl enable libvirtd





If you need to access the virt-manage tool from non-root user(lets say 'ubuntu'), then add it to libvirt & kvm group using the below command:

    $ sudo usermod -aG libvirt $USER
    $ sudo usermod -aG kvm $USER

Now reboot the system and once its back, it should be ready to use.






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