8.3. Restarting a virtual machine by using the command line

Procedure

• Restarting a responsive VM

  • If you are connected to the guest, use a restart command or a GUI element appropriate to the guest operating system.

  • Alternatively, use the virsh reboot command on the host:

    • If the VM is on a local host:

      # virsh reboot demo-guest1
      Domain 'demo-guest1' is being rebooted

    • If the VM is on a remote host, in this example 192.0.2.1:

      # virsh -c qemu+ssh://root@192.0.2.1/system reboot demo-guest1
      
      root@192.0.2.1's password:
      Domain 'demo-guest1' is being rebooted

• Restarting an unresponsive VM

  1. Force a VM to shut down.

     # virsh destroy demo-guest1
     Domain 'demo-guest1' destroyed

     注意

     The virsh destroy command does not actually delete or remove the VM configuration or disk images. It only terminates the running instance of the VM, similarly to pulling the power cord from a physical machine.

     In rare cases, virsh destroy may cause corruption of the VM’s file system, so use this command only if all other shutdown methods have failed.

  2. Start the VM again.

     # virsh start demo-guest1
     Domain 'demo-guest1' started

Verification

• On the host, display the list of your VMs to see their status.

  # virsh list --all
  
   Id    Name                 State
  ------------------------------------------
   1     demo-guest1          running