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:::Issue this command: <b><code><span style="color:#3366CC;font-size:1.2em;">virsh define centos3a.xml</span></code></b>
:::Issue the command <b><code><span style="color:#3366CC;font-size:1.2em;">virsh list --all</span></code></b> and record any changes.
:::Issue the command: <b><code><span style="color:#3366CC;font-size:1.2em;">virsh undefine centos3a</span></code></b>{| width="40%" align="right" cellpadding="10"|- valign="top"|colspan="2"|{{Admon/tip|Shutting Down the Host while Virtual Machines are Running|If you shut down your host system while virtual machines are running, they will be suspended, and will resume the next time you boot your host system.}}|}
<ol>
<livalue="17">List all of the virtual machines again, and note any changes. </li></ol>
<li>For the remainder of these labs, it is assumed that you will backup <u>'''both'''</u> the images and xml configuration files for <u>'''all'''</u> Virtual machines, when asked to backup your virtual machines. It is also highly recommended to backup these files to an external storage device (eg. USB key) in case the host machine gets "wiped" and you need to rebuild your HOST machine and then restore your Virtual Machines...</li>
<li>Answer this question in your log book:</li>
::* In order to fully back up a virtual machine, what information should be saved in addition to the virtual machine image?
'''Answer the Investigation observations / questions in your lab log book.'''
