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  • First of all we should set the needed switches for the virtualization from biosBIOS.
  • Once we set them we are going to see if our computer really supports KVM. If the output from this command is 1 or more, it does :
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          egrep -c '(vmx|svm)' /proc/cpuinfo

    In our case,he output is 2, so we can continue with the installation.

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  • We should test if the installation it's been successful with the following comandcommand:
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 virsh -c qemu:///system list

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   /var/run/libvirt/libvirt-sock : Permission denied
   failed to connect to the hypervisor

          So trying to find out the problem I restart the computer and this problem was solved, but the the  computer lost the eth0 internet conectionInternet connection.   

     The problem was that the virtual conection connection (virbr0) created for the virtual machines, disable the eth0   conectioneth0 connection. So I bring up the ethernet Ethernet interface
with the following comand:command