我正在尝试获取我的Ubuntu计算机的更新，但它会不断返回
W: GPG error: https://s3-us-east-2.amazonaws.com/dvc-s3-repo/deb stable InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A4FE3F1F028E6681
我搜索了此问题的解决方案，并找到了以下代码：
apt-key adv --keyserver keyserver.ubuntu.com --recv-keys A4FE3F1F028E6681
但这也不起作用，并返回：
gpg: keyserver receive failed: No data