Two options: set a local alias in /etc/hosts
Option two: change the URL in your repo file to point to your local mirror
April 09, 2020 at 02:53PM
via reddit https://www.reddit.com/r/homelab/comments/fxy0b2/point_internet_linux_repo_to_internal_lan_repo_is/fmx4nhb?utm_source=ifttt