1.报错背景

将ubuntu的源修改为国内源的之后,执行sudo apt-get update报错:

GPG error: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 7EA0A9C3F273FCD8

N:see apt-secure(8) manpage for repository creation and user

2.解决方案

公钥(7EA0A9C3F273FCD8)根据提示来写的。

sudo gpg --keyserver keyserver.ubuntu.com --recv 7EA0A9C3F273FCD8

sudo gpg --export --armor 7EA0A9C3F273FCD8 | sudo apt-key add -

3.验证

sudo apt-get update