On Tue, Sep 06, 2011 at 01:16:42PM -0400, Ben Clay wrote: Here is the code: http://git.annexia.org/?p=libguestfs.git;a=blob;f=daemon/zerofree.c;h=f98... As you can see, it is checking for a zerofree binary somewhere along the $PATH inside the appliance. In the appliance, PATH=/usr/sbin:/usr/bin:/sbin:/bin [...] Yup, not there. By the way, this is a really really old version of libguestfs ... There should be a host file called something similar to /usr/lib*/guestfs/initramfs.epel-5.i686.supermin.hostfiles (it might have a slightly different name). This file should contain a line: ./usr/sbin/zerofree For example: $ grep zerofree /usr/lib/guestfs/initramfs.epel-5.i686.supermin.hostfiles ./usr/sbin/zerofree If that line is there, then /usr/sbin/zerofree on the host filesystem should be copied into the appliance. If it is not there, you could try adding that line. NB the initial dot. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones libguestfs lets you edit virtual machines. Supports shell scripting, bindings from many languages. http://libguestfs.org