Updating gpg key ubuntu
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The repository is not updated and the previous index files will be used. Done Building dependency tree Reading state information… Done The following packages will be upgraded:apparmor libapparmor-perl libapparmor1 python3-distupgrade python3-software-properties software-properties-common ubuntu-release-upgrader-core7 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. After this operation, 5,120 B of additional disk space will be used. [Y/n] y The KEYEXPIRED shows that validation failed on the related repository signature.
GPG error: xenial Release: The following signatures were invalid: KEYEXPIRED 1471427554W: Failed to fetch following signatures were invalid: KEYEXPIRED 1471427554W: Some index files failed to download. This is a good thing, to warn us that we should be checking the repository. The second one is showing that the key is expired (including the date). To quickly find the expired keys, search for “expired:”: One more thing...
If an expiration date was set when a key was generated, it will eventually expire.
Some of you may have encountered an issue, stating that your Bytemark GPG Keys have expired.
Visit Stack Exchange W: https://download.01.org/gfx/ubuntu/16.04/main/dists/xenial/In Release: Signature by key 09D6EF97BFB38E916EF060E756A3DEF863961D39 uses weak digest algorithm (SHA1) W: GPG error: In Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 73F0D6E88E3D6C3A W: The repository ' In Release' is not signed.