18

how can i ignore this message?

W: GPG error: https://download.01.org/gfx/ubuntu/16.04/main xenial InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 56A3DEF863961D39
W: The repository 'https://download.01.org/gfx/ubuntu/16.04/main xenial InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Its from intel update gfx.

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  • 1
    It is better not to install anything from download.01.org. You will get only trouble.
    – Pilot6
    Sep 9, 2016 at 22:26
  • I agree with @Pilot6. Suggest you remove that repository. Cheers, Al
    – heynnema
    Sep 10, 2016 at 2:04
  • 2
    @Pilot6 what do you suggest as an alternative ?
    – kmonsoor
    Apr 10, 2017 at 14:44

3 Answers 3

16

I managed to solve it for Ubuntu 16.04 and 16.10 by running following commands

wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-GROUP-KEY-ilg -O - | sudo apt-key add -
wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-KEY-ilg -O - | sudo apt-key add -
wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-KEY-ilg-2 -O - | sudo apt-key add -
wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-KEY-ilg-3 -O - | sudo apt-key add -
wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-KEY-ilg-4 -O - | sudo apt-key add -
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  • 6
    Works but shows W: https://download.01.org/gfx/ubuntu/16.04/main/dists/xenial/InRelease: Signature by key 09D6EF97BFB38E916EF060E756A3DEF863961D39 uses weak digest algorithm (SHA1) at the end of apt update. Apr 10, 2017 at 5:20
  • This works definately.
    – saviour123
    Dec 5, 2017 at 14:43
10

Try to add the key (replace 56A3DEF863961D39 with your missing key):

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 56A3DEF863961D39
sudo apt-get update

References and further reading:

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  • 2
    this should be the accepted answer.
    – Alex
    Jun 3, 2017 at 11:11
  • Was not sure about this method, but it works! Thanks!
    – user262439
    Nov 26, 2017 at 11:10
3

Open a terminal & run

wget --no-check-certificate https://download.01.org/gfx/RPM-GPG-KEY-ilg-4 -O - | sudo apt-key add -

This will allow updates, you'll get the weak digest algorithm warning but it's just a warning at the moment. (in 16.04

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