Re: Md5sum missmatch after transfer from windows to RH9

[Rick Stevens <rstevens vitalstream com>]

michael Alexander wrote:
> > -----Original Message-----
> > From: redhat-install-list-admin redhat com 
> > [mailto:redhat-install-list-admin redhat com] On Behalf Of 
> > Rick Stevens
> > Sent: Friday, January 02, 2004 3:58 PM
> > To: redhat-install-list redhat com
> > Subject: Re: Md5sum missmatch after transfer from windows to RH9
> >
> >
> > michael Alexander wrote:
> >
> > > Hi,
> > >
> > >  I downloaded 5 of the 6 ISOs from the redhat ftp site to 
> >
> > my windows xp
> >
> > > workstation (as well as a md5sum.exe to check them) and 
> >
> > they all checked out
> >
> > > fine.  Then I transferred them to my RH9 system (I need to 
> >
> > rebuild the
> >
> > > kernel to do an install onto some troublesome hardware) 
> >
> > using the Zmodem
> >
> > > transfer within SecureNetTerm 5.3.4.0.  All the file sizes 
> >
> > match, but the
> >
> > > checksums do not match anymore.  I downloaded the 6th ISO 
> >
> > from a closer
> >
> > > mirror site directly to the RH9 system, and its md5sum 
> >
> > checks out fine.  (I
> >
> > > used the zmodem transfer because ftp wasn't running on the server)
> > >
> > >  Should I be concerned about this?  I am all up to date 
> >
> > with antivirus on
> >
> > > my workstation, the RH9 system was just built on Tuesday 
> >
> > and has no direct
> >
> > > connection to the outside world.
> >
> > Yes, I'd be concerned.  The ISOs aren't correct unless the 
> > MD5 checksums
> > match up.  The trick with zmodem is that it will truncate 
> > null bytes at
> > the end of a file.  The .iso files need the null padding (they MUST be
> > a multiple of 2048 bytes in length--the block size of a CD-ROM).
> >
> > Your best bet is to retransfer them using FTP or burn them to CDs off
> > the Windows machine (with the correct MD5 checksums).
>
>
> If I'm only using them for the kernel rebuild does it matter, since I wont
> be burning a CD from them on the RH system?  Only following the directions
> at...
> http://www.techonthenet.com/linux/rh9_update.htm
>
> I didn't get any errors when I extracted the files (the mount commands at
> the end of step 1)

You got lucky, then.  You're probably OK, but in the future, if the MD5
checksums don't match, don't trust the .iso file.
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- Rick Stevens, Senior Systems Engineer     rstevens vitalstream com -
- VitalStream, Inc.                       http://www.vitalstream.com -
-                                                                    -
-   Whoever said "Money can't buy friends" obviously never brought   -
-                        donuts to the office.                       -
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