thomasd538
Posts: 11
Joined: Thu Sep 20, 2012 3:01 pm

SHA-1 Checksum

Tue Jan 01, 2013 6:57 pm

Folks I check on the board before I posted the following:

IT Should be SHA-1 Checksum: 514974a5fcbbbea02151d79a715741c2159d4b0a

Others and I are getting a Checksum: 6ac10d049cd8cf3876a74493830dca586487c585

Anyone know what's up?

Thanks in Advance

Tom
Happy New Year

ShiftPlusOne
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 5757
Joined: Fri Jul 29, 2011 5:36 pm
Location: The unfashionable end of the western spiral arm of the Galaxy

Re: SHA-1 Checksum

Tue Jan 01, 2013 7:30 pm

Are you checking the img or the zip file?

thomasd538
Posts: 11
Joined: Thu Sep 20, 2012 3:01 pm

Re: SHA-1 Checksum

Tue Jan 01, 2013 8:18 pm

img

ShiftPlusOne
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 5757
Joined: Fri Jul 29, 2011 5:36 pm
Location: The unfashionable end of the western spiral arm of the Galaxy

Re: SHA-1 Checksum

Tue Jan 01, 2013 8:20 pm

Well there's ye problem. =)

thomasd538
Posts: 11
Joined: Thu Sep 20, 2012 3:01 pm

Re: SHA-1 Checksum

Tue Jan 01, 2013 8:42 pm

Ok this is where my ignorance really becomes even more obvious:

Do I only use checksum if I am downloading a zip file or do I need a different checksum value for the img file?

Thanks In Advance

I will share this info with my students to help all of us to become a little less dumb. :)

BobCochran
Posts: 27
Joined: Sat Dec 29, 2012 2:51 am
Location: Greenbelt, Maryland, USA

Re: SHA-1 Checksum

Tue Jan 01, 2013 8:58 pm

The checksum is for the file that you are downloading -- the zip file. The purpose is to make sure that the contents of the zip archive have not been modified in any way from how the distributors packaged it. If the checksum on the zip file matches what the distributors publish, you are good to go and you can extract the image from it.

Thanks

Bob Cochran
Greenbelt, Maryland, USA

bgirardot
Posts: 517
Joined: Wed Oct 10, 2012 6:20 am
Location: Switzerland

Re: SHA-1 Checksum

Tue Jan 01, 2013 10:53 pm

for what it is worth:

It would be pretty easy to think you should use the .img file since the directions say "drag the image file" into the sha checksum generator for windows.

http://downloads.raspberrypi.org/verify ... image.html

I wrote the foundation to ask them to clarify/fix that page to say 'zip file'

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