>> Thanks. Is it possible that shred exit abnormally in any case (for example, >> some files that it relies on have been shreded)? > > Without physical access to the machine so you can see (and control) what is > actually going on, there is no way to 100% guarantee that the data is > completely destroyed. > If you had some disk space could you create a partition and install a minimalistic Linux version, set your system to boot the minimalistic Linux version, log in and completely destroy any partition you want and you could just leave the minimalistic Linux version.