Ubuntu – “GPG error:The following signatures were invalid: KEYEXPIRED”

apt

The error I am having when trying to update my package list.

W: GPG error: http://download.opensuse.org ./ Release: The following signatures were invalid: KEYEXPIRED 1436387333

W: Failed to fetch http://ppa.launchpad.net/samrog131/ppa/ubuntu/dists/trusty/main/binary-amd64/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

Best Answer

GPG error: http://download.opensuse.org ./ Release: The following signatures were invalid: KEYEXPIRED 1436387333

This says that your GPG key for that repository has expired, which means one of two things, either your system has the wrong date or the key really expired. For the later, you need to contact the repository maintainer and import the new key (removing the old one, probably), once the repository updates their keys to sign the files.

You can safely ignore these messages if you aren't using packages of these repositories. The message can be removed if you remove the repository from your source.list file/directory.

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