Introduction bunker is a file integrity check utility based on the original bitrot utility of jbartlett and the calculated sha keys are compatible with bitrot.  I want to thank jbartlett for bringing out his excellent idea and my version can be seen as an alternative which I initially developed to fulfill my own requirements and now may be useful to others.   The purpose of bunker is to save the calculated hash value in the extended attributes of a given file, this allows for regular checki