Details: Remove an extra space between $ and LIBVIRT_VOL_NAME, in the following section:

Upload the peer pod QCOW2 image to your libvirt volume:
 
 
$ virsh -c qemu:///system vol-upload \
--vol $ LIBVIRT_VOL_NAME \
$IMAGE_OUTPUT_DIR/podvm-*.qcow2 \
--pool $LIBVIRT_POOL --sparse

Documentation URL: https://dxp-docp-prod.apps.ext-waf.spoke.prod.us-west-2.aws.paas.redhat.com/documentation/en-us/openshift_sandboxed_containers/1.6/html-single/openshift_sandboxed_containers_user_guide/index?lb_target=preview#ibm-building-peer-pod-image_ibm