Ubuntu安全--问题解决

public key is not available

​复现​

 将Ubuntu的源修改为国内源的之后，执行

sudo apt-get update

出现问题：

GPG error: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7EA0A9C3F271FCD1

​解决方法​

sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com XXXX

XXXX：错误提示中的公钥。本处是：7EA0A9C3F271FCD1