Set the path that guestfish uses to search for kernel and initrd.img.
See the discussion of paths in L<guestfs(3)>.
+=item LIBGUESTFS_QEMU
+
+Set the default qemu binary that libguestfs uses. If not set, then
+the qemu which was found at compile time by the configure script is
+used.
+
=item HOME
If compiled with GNU readline support, then the command history