sudo apt update在Debian上运行时出现以下错误.
GPG error: http://packages.cloud.google.com/apt cloud-sdk-stretch InRelease:
The following signatures were invalid: EXPKEYSIG 3746C208A7317B0F
This is the first time I figured I had better check the keys of the bind software I want to install. So I downloaded what I think is a OpenPGP key ...
$ wget ftp://ftp.isc.org/isc/bind9/9.9.4/bind-9.9.4.tar.gz.sha1.asc
... then I tried to "import" this key like this ...
$ gpg --import bind-9.9.4.tar.gz.sha1.asc
... but I get this error message:
gpg: no valid OpenPGP data found.
gpg: Total number processed: 0
What am I doing wrong?
Thanks!