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Siever, Ellen; Figgins, Stephen; Love, Robert; Robbins, Arnold (2009-09-22). Linux in a Nutshell (6 ed.). O'Reilly. p. 850. ISBN978-0-596-15448-6. [...] the Red Hat Virtual Machine Manager application [...] is a collection of tools built using libvirt. This includes a few command-line tools as well as the GUI virt-manager application.