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{{Admon/note|About KVM|There are actually several key programs installed for virtualization using KVM:<ul><li>'''kvm/qemu''' - the hypervisor and other hardware emulation systems.</li><li>A system service named '''libvirtd''' that manages the VMs.</li><li>A graphical tool for managing virtual machines ('''virt-manager''') and the '''virsh''' command-line tool.</li></ul>}}
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<ol><li value="7">Start the virtualization service: <b><code><span style="color:#3366CC;font-size:1.2em;">systemctl start libvirtd</span></code></b><br><br><br>'''NOTE:''' The most recent variants of Centos and Fedora are using a service called '''firewalld''' that is intended to replace '''iptables''', however the ''iptables'' service is still in relatively common usage. In this course we will concentrate on ''iptables''.<br><br></li>
<li>To Disable firewalld issue the following commands:<br>
<b><code><span style="color:#3366CC;font-size:1.2em;">systemctl disable firewalld</span></code></b><br>
