[root@localhost san]# yum update
CentOS-8 - AppStream 0.0 B/s | 0 B 00:30
CentOS-8 - Base 0.0 B/s | 0 B 00:30
CentOS-8 - Extras 0.0 B/s | 0 B 00:30
Failed to synchronize cache for repo 'AppStream', ignoring this repo.
Failed to synchronize cache for repo 'BaseOS', ignoring this repo.
Failed to synchronize cache for repo 'extras', ignoring this repo.
Dependencies resolved.
Nothing to do.
Complete!
[root@localhost san]#