On 12/09/2012 00:14, Polytropon wrote: > % cksum <directory> > > and could obtain a checksum - so it _seems_ to work. > After alteration of one file within the hierarchy a > different result was printed.
That will give you a checksum on the directory inode -- file names and
associated metadata only, not file content. In theory you could edit a
file without modifying any of the timestamps, and that wouldn't result
in any change to the directory checksum. Also, modifying things a few
layers down the filesystem hierarchy won't have any effect either.
Generally I find the best test for differences between old and new
copies of a filesystem is 'rsync -avx -n ...'
Also, sum and cksum have way too small a key size for this to be
reliable, since you can't tell a true result from a hash collision. Use
md5 or sha1 or sha256 for best results.
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil.
PGP: http://www.infracaninophile.co.uk/pgpkey
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