Virt-manager is a graphical user interface (GUI) application used to manage virtual machines (VMs). It provides a central hub for managing virtualization on a single machine or across a network of machines. It can be used to create, configure, start, pause, and stop virtual machines, as well as manage physical resources such as network and storage. In addition, it can also be used to view the consoles of virtual machines, manage various aspects of the virtualization environment, and perform various system tasks such as cloning, snapshotting, and booting. It is compatible with popular virtualization platforms such as KVM, Xen, and VMware.
virt-manager is an interface to KVM and other VM hosts. VirtualBox is a virtual machine host with an integrated interface.