On Tue, 8 Jan 2013 18:57:03 -0500 Yungwei Chen wrote: > 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. Many things could theoretically cause the process to end before completion, including someone on the other end simply disconnecting the power. If it absolutely has to be destroyed, then the only completely reliable way is to physically take control of the machine and carry on from there. -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com www.creekfm.com - FIFTY THOUSAND WATTS of POW WOW POWER!