cksum entire dir??
matthew at FreeBSD.org
Wed Sep 12 06:32:08 UTC 2012
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.
Dr Matthew J Seaman MA, D.Phil.
-------------- next part --------------
A non-text attachment was scrubbed...
Size: 264 bytes
Desc: OpenPGP digital signature
Url : http://lists.freebsd.org/pipermail/freebsd-questions/attachments/20120912/fbfa5212/signature.pgp
More information about the freebsd-questions