Comment 1 for bug 1370567

More information here from Richard W.M. Jones:

 - 'sudo update-guestfs-appliance' goes away with libguestfs >= 1.26
   in Debian & Ubuntu, where, finally, they have got rid of that daft
   script, and the appliance gets built automatically on demand, as
   happens on Fedora and everywhere else.

 - However Ubuntu does still have the kernel permissions problem, and
   this will probably stay this way forever, since we haven't managed
   to persuade them that what they are doing is stupid.

So since the situation is fluid, perhaps it's better just to link to
the FAQ?

http://libguestfs.org/guestfs-faq.1.html#downloading-installing-compiling-libguestfs