"caveat is that the union will use I<DIR> from the image's read-only file "
"system, not the real file system root, so files created after boot (e.g. by "
"live-config) will not appear in the union. This option will use the union "
"caveat is that the union will use I<DIR> from the image's read-only file "
"system, not the real file system root, so files created after boot (e.g. by "
"live-config) will not appear in the union. This option will use the union "