Mandrake Update problem
 

I want to update my version of cdrecord and it was suggested I use the Mandrake control centre to do this. I went into Mandrake Update and found there are many packages that could be automatically installed if I selected them. I selected 4 (cdrecord, mkisofs, passwd & rpmdrake). However when I attempted to install them by clicking the install button on the GUI, I was given a warning message;

"The folowing packages have bad signatures"
all 4 packages I had selected were listed as having
"Missing signature, couldn't open file"
"Do you want to continue anyway?"

I got scared and backed out.

What has gone wrong here?
I have Mandrake 10.

Hello!
It probably means it didn't downloaded/readed correclty (the files you where trying to install)
do this:

Open a console, (Xterm, Eterm, whatever (on System->Consoles)), and from there type "mcc" that means Mandrake Control Center.
Then try to install the files again, on the console you'll see a better detail about what is going on.
if you see the system is whining about an error downloading the file then what you can do is this:
go to the packages install section in the control center.
Press the update sources icon (my mandrake is in spanish, so I can't tell you the exact name, is the box with the RPM letters)
Once there press the "Update" button and check everything except the instalation CD's .
This will make mandrake to check for new files, because there's a good chance your mandrake sources are outdated and because of that it try to download a file that doesn't exist in the server anymore.
when this procedure is finished (it won't appear a dialog, you'll go back to the package source manager again), press the OK button and try to install those packages again.

Good luck!!

99% of the time, Missing/Bad signature warnings are ignorable. You *should* update your sources before downloading any program updates, just to be sure.

Thanks,
What does "update your sources" mean?

sources is the list of rpm packages your repository has. Mandrake Control Centre uses RPMDrake to install the software. see http://wiki.linuxquestions.org/wiki/URPMI
for more information.