Update cd-install.md

docs/cd-install.md

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+```
+# Create the storage pool definition
+$ virsh pool-define-as iso dir - - - - "/var/lib/libvirt/iso"
+Pool iso defined
+
+# Verify the storage pool is listed
+$ virsh pool-list --all
+ Name           State      Autostart
+--------------------------------------
+ boot-scratch   active     yes
+ default        active     yes
+ iso            inactive   no
+
+# Create the local directory
+$ virsh pool-build iso
+Pool iso built
+
+$ sudo ls -la /var/lib/libvirt/iso
+total 8
+drwx--x--x  2 root root 4096 Oct  7 14:47 .
+drwxr-xr-x 10 root root 4096 Oct  7 14:47 ..
+
+$ virsh vol-list --pool iso --details
+ Name   Path   Type   Capacity   Allocation
+---------------------------------------------
+
+# Start the storage pool
+$ virsh pool-start iso
+Pool iso started
+
+$ virsh pool-list --all
+ Name           State    Autostart
+------------------------------------
+ boot-scratch   active   yes
+ default        active   yes
+ iso            active   no
+
+# Turn on autostart
+$ virsh pool-autostart iso
+Pool iso marked as autostarted
+
+$ virsh pool-list --all
+ Name           State    Autostart
+------------------------------------
+ boot-scratch   active   yes
+ default        active   yes
+ iso            active   yes
+
+# Verify the storage pool configuration
+$ virsh pool-info iso
+Name:           iso
+UUID:           a5110ddc-1142-4a49-9652-0232280cf5a7
+State:          running
+Persistent:     yes
+Autostart:      yes
+Capacity:       960.65 GiB
+Allocation:     131.41 GiB
+Available:      829.24 GiB
+
+$ sudo ls -ld /var/lib/libvirt/iso
+drwx--x--x 2 root root 4096 Oct  7 14:47 /var/lib/libvirt/iso
+
+$ sudo curl -L https://releases.ubuntu.com/22.04.3/ubuntu-22.04.3-live-server-amd64.iso -o /var/lib/libvirt/iso/ubuntu-22.04.3-live-server-amd64.iso
+
+$ sudo shasum -a 256 /var/lib/libvirt/iso/ubuntu-22.04.3-live-server-amd64.iso
+a4acfda10b18da50e2ec50ccaf860d7f20b389df8765611142305c0e911d16fd  /var/lib/libvirt/iso/ubuntu-22.04.3-live-server-amd64.iso
+```
+
+```
+$ virsh vol-create-as default ubuntu-image.qcow2 20G --format qcow2
+Vol ubuntu-image.qcow2 created
+
+$ virsh vol-info --pool default ubuntu-image.qcow2
+Name:           ubuntu-image.qcow2
+Type:           file
+Capacity:       20.00 GiB
+Allocation:     196.00 KiB
+
+virt-install \
+  --connect qemu:///system \
+  --name ubuntu-image \
+  --memory 4096 \
+  --vcpus 2 \
+  --disk pool=default,size=20,format=qcow2 \
+  --cdrom /var/lib/libvirt/iso/ubuntu-22.04.3-live-server-amd64.iso \
+  --os-variant ubuntu22.04 \
+  --network network=default,model=virtio \
+  --boot uefi \
+  --debug \
+  --noreboot
+
+$ virsh domblklist ubuntu-image
+ Target   Source
+--------------------------------------------------------
+ vda      /var/lib/libvirt/images/ubuntu-image-1.qcow2
+ sda      -
+
+$ virsh change-media ubuntu-image sda --eject
+error: The disk device 'sda' doesn't have media
+
+
+$ virsh detach-disk ubuntu-image sda --config
+
+$ virsh domblklist ubuntu-image
+ Target   Source
+--------------------------------------------------------
+ vda      /var/lib/libvirt/images/ubuntu-image-1.qcow2
+```
+
+```
+$ virsh vol-delete --pool default ubuntu-image.qcow2
+Vol ubuntu-image.qcow2 deleted
+```
+
+```
+virt-install \
+  --connect qemu:///system \
+  --name testy-ubuntu \
+  --vcpus 2 \
+  --memory 2048 \
+  --boot uefi \
+  --cdrom /var/lib/libvirt/isos/ubuntu-22.04.3-live-server-amd64.iso \
+  --network network=host-network,model=virtio \
+  --disk bus=virtio,size=32 \
+  --os-variant ubuntu22.04
+
+## BIOS PXE boot
+virt-install \
+  --connect qemu:///system \
+  --name testy-ubuntu \
+  --vcpus 2 \
+  --memory 2048 \
+  --pxe \
+  --network network=host-network,model=virtio \
+  --disk path=/var/lib/libvirt/images/testy-ubuntu.qcow2,bus=virtio,size=32 \
+  --os-variant ubuntu22.04
+
+## UEFI PXE boot
+sudo dd if=/dev/zero of=/var/lib/libvirt/images/testy-ubuntu-efivars.fd bs=1M count=64
+sudo dd if=/usr/share/AAVMF/AAVMF_VARS.fd of=/var/lib/libvirt/images/testy-ubuntu-efivars.fd conv=notrunc
+
+virt-install \
+  --connect qemu:///system \
+  --name ubuntu-image \
+  --vcpus 2 \
+  --memory 2048 \
+  --boot uefi \
+  --network network=host-network,model=virtio \
+  --disk path=/var/lib/libvirt/images/ubuntu-image.qcow2,bus=virtio,size=32 \
+  --os-variant ubuntu22.04 \
+  --print-xml > vm.xml
+
+virsh define vm.xml
+
+
+virt-install \
+  --connect qemu:///system \
+  --name ubuntu-image \
+  --boot uefi \
+  --memory 2048 \
+  --vcpus 2 \
+  --os-variant ubuntu20.04 \
+  --disk path=/data/vms/ubuntu-image.qcow2,bus=virtio \
+  --import \
+  --noautoconsole \
+  --network network=default,model=virtio \
+  --graphics spice \
+  --video model=virtio \
+  --console pty,target_type=serial