Ubuntu遇到W: GPG error: The following signatures couldn't be verified问题

如下：

W: GPG error: http://repo.mysql.com/apt/ubuntu bionic InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 467B942D3A79BD29

解决方法：

sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29

Executing: /tmp/apt-key-gpghome.rTJ5kkXHtV/gpg.1.sh --keyserver keyserver.ubuntu.com --recv-keys 467B942D3A79BD29
gpg: key 467B942D3A79BD29: public key "MySQL Release Engineering <mysql-build@oss.oracle.com>" imported
gpg: Total number processed: 1
gpg:               imported: 1

上面的命令会将密钥添加到系统中。只需执行 sudo apt-get update ，您就不会再看到此错误了。