To start virt-manager session, from the Applications menu, click System Tools and select Virtual Machine Manager(virt-manager).

The virt-manager main window appears.

Alternatively, virt-manager can be started remotely using ssh as demonstrated in the following command:

ssh -X host's address
[remotehost]# virt-manager

Using ssh to manage virtual machines and hosts is discussed further in Section 18.1, “Remote management with ssh”.