Md5sum checking

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Checking the MD5sum

ALWAYS run a check sum before you burn that iso file to a CD. This will verify that what you downloaded matches what they expected you to download so that you're not burning junk to the CD.

Running an MD5sum in Linux

If you're in Linux running an md5sum is very easy because the MD5SUM generation program already exists (in just about every distro that is). At a command line just type...

 md5sum cdImageName.iso

which will return a 32 digit signature. This signature should match the MD5SUM for the ISO that the distribution has provided.

    	pclinuxos-kde-2010.12.iso	17-Dec-2010 02:57 	691M
        pclinuxos-kde-2010.12.md5sum    17-Dec-2010 03:08 	60 

Now after downloading CD pclinuxos-kde-2010.12.iso From the command line (console window) run the following:

md5sum pclinuxos-kde-2010.12.iso

to which I better get back... 72f39788908f11ccc630bd5bfef2d53e pclinuxos-kde-2010.12.iso

Also you can check it when running K3B.

K3b-linux.png

If it matches, you're good to go......


Running an MD5sum in Windows

If you're in windows, you'll need to download a free MD5sum generation program. You can get one in many places on the web, here are two:

 http://www.md5summer.org/
 http://www.etree.org/md5com.html

Running one of these programs will return you the same 32 digit signature that you must match against the one given by the server. One of the programs at the two links above works from a DOS prompt (aka Windows command line) and the other is a GUI based program.

Md5-windows.jpg

In Windows run md5sum.exe pclinuxos-kde-2010.12.iso to which I better get back... 72f39788908f11ccc630bd5bfef2d53e

If it matches, you're good to go and on your way to installing Linux!!

The MD5sum value generated by the ISO that you downloaded MUST match. Don't attempt to burn the ISO to a CD because you'll just frustrate yourself and waste a CDR if the ISO was bad to start with.

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