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Fix Yarn Packaging Signature Invalid - EXPKEYSIG 23E7166788B63E1E Yarn Packaging

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When running apt-get update at Ubuntu 20.04.5 LTS, got below errors:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>

W: Failed to fetch https://dl.yarnpkg.com/debian/dists/stable/InRelease  The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>

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

To resolve just running below command.

export YARNKEY=yarn-keyring.gpg

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo gpg --dearmour -o /usr/share/keyrings/$YARNKEY

echo "deb [signed-by=/usr/share/keyrings/$YARNKEY] https://dl.yarnpkg.com/debian stable main" | sudo tee /etc/apt/sources.list.d/yarn.list

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