On Tue, Nov 20, 2007 at 09:52:43AM -0500, Ray Leventhal wrote: > Fajar Priyanto wrote: > > Hi all, > > A friend of mine gives me a copy of Centos5 DVD. > > I then make an iso of it using dd if=/dev/cdrom of=centos5.iso command. > > I then check it using sha1sum. > > But the result is different than of listed in Centos website. > > Should it the same? Or we simply cannot compare sha1sum from burned DVD to > > that of 'unburned' iso file? > > Thanks. > > > an afterthought - > > the subject of your mail was md5sum...the body speaks about sha1sum. > They're different mechanisms; comparing a sha hash to an md5 will > always be different, I believe. definitely! this and the relevant links might help: http://www.g-loaded.eu/2006/10/07/verify-a-burned-cddvd-image-on-linux/#more-291 Cheers, Tru -- Tru Huynh (CentOS-3 i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B
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