sudo apt-get update时出现以下错误：

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.

第一个解决方案无效：

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -

askubuntu解决方案有效果：

curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | gpg --dearmor | sudo tee /usr/share/keyrings/yarnkey.gpg >/dev/null

https://askubuntu.com/questions/1306111/why-yarn-key-update-failes-all-the-time-gpg-error-https-dl-yarnpkg-com-debia