当我尝试在CentOS Stream 8 上安装或更新软件包时，出现以下错误：
cd ~
sudo yum update
输出：
PostgreSQL common RPMs for RHEL / Rocky 8 - x86_64 613 B/s | 659 B 00:01
PostgreSQL common RPMs for RHEL / Rocky 8 - x86_64 1.6 MB/s | 1.7 kB 00:00
PostgreSQL common RPMs for RHEL / Rocky 8 - x86_64 503 B/s | 659 B 00:01
Error: Failed to download metadata for repo 'pgdg-common': repomd.xml GPG signature verification error: Bad GPG signature
我尝试在 CentOS 7 服务器上安装Docker …