Security apt找不到公钥6DB5542C356545CF
运行sudo apt update后，Heroku存储库出现以下错误，表明签名验证失败，缺少公钥Security apt找不到公钥6DB5542C356545CF,security,heroku,apt,heroku-cli,Security,Heroku,Apt,Heroku Cli,运行sudo apt update后，Heroku存储库出现以下错误，表明签名验证失败，缺少公钥6db5542c3545cf。我能在网上找到的关于这把钥匙的唯一信息是日语或韩语，这两种语言我都不懂，翻译它们不会透露任何特别有用的信息。我担心这可能是MITM攻击，有人有任何信息或建议吗 完整错误消息： W: An error occurred during the signature verification. The repository is not updated and the previ
6db5542c3545cfW: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://cli-assets.heroku.com/apt ./ InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6DB5542C356545CF
W: Failed to fetch https://cli-assets.heroku.com/apt/./InRelease The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 6DB5542C356545CF
W: Some index files failed to download. They have been ignored, or old ones used instead.
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 6DB5542C356545CF
sudo apt-get update
sudo apt-get update