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→Part 1: Install KVM Virtualization Application
===Part 1: Install KVM Virtualization Application===
We will now install the KVM package in order to create our remaining "nested" VMs. We will also be starting several services (including iptablesnftables) and disabling the firewalld service. We will learn more about managing firewalls using iptables nftables in lab6.
:'''Perform the following steps:'''
{{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 '''libvirt''' 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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</li><li>Start the virtualization service: <b><code><span style="color:#3366CC;font-size:1.2em;">sudo systemctl start libvirtlibvirtd</span></code></b><br><br>'''NOTE:''' The most recent variants of CentOS and Fedora are using a service called '''firewalld''' that replaces '''iptables''', however the ''iptables'' service is still in relatively common usage and knowing how to use it also works with firewalld. In this course we will concentrate on ''iptables''.<br><br></li>
<li>To disable and remove firewalld, issue the following commands:<br>
<b><code><span style="color:#3366CC;font-size:1.2em;">sudo systemctl disable firewalld</span></code></b><br>
