virt-xml: add page (#9456)

pages/linux/virt-xml.md

@@ -0,0 +1,29 @@
+# virt-xml
+
+> Edit libvirt Domain XML files with explicit command line options.
+> NOTE: 'domain' refers to the name, UUID or ID for the existing VMs (See: tldr virsh).
+> More information: <https://github.com/virt-manager/virt-manager/blob/main/man/virt-xml.rst>.
+
+- List all the suboptions for a specific option:
+
+`virt-xml --{{option}}=?`
+
+- List all the suboptions for disk, network, and boot:
+
+`virt-xml --disk=? --network=? --boot=?`
+
+- Edit a value for a specific domain:
+
+`virt-xml {{domain}} --edit --{{option}} {{suboption}}={{new_value}}`
+
+- Change the description for a specific domain:
+
+`virt-xml {{domain}} --edit --metadata description="{{new_description}}"`
+
+- Enable/Disable the boot device menu for a specific domain:
+
+`virt-xml {{domain}} --edit --boot bootmenu={{on|off}}`
+
+- Attach host USB hub to a running VM (See: tldr lsusb):
+
+`virt-xml {{domain}} --update --add-device --hostdev {{bus}}.{{device}}`