这个yum的问题如何解决?

小菜刀

[root@fedora ~]# yum update

You have enabled checking of packages via GPG keys. This is a good thing.
However, you do not have any GPG public keys installed. You need to download
the keys for packages you wish to install and install them.
You can do that by running the command:
    rpm --import public.gpg.key
For more information contact your distribution or package provider.

hew

去你的yum 服务端下载 public.gpg.key 然后rpm --import public.gpg.key