Apt-Cacher-NG User Manual

https://salsa.debian.org/blade/apt-cacher-ng

Issues

https://salsa.debian.org/blade/apt-cacher-ng/-/issues

https://salsa.debian.org/blade/apt-cacher-ng/-/issues/17

apt clients stuck on parallel access

Reading from proxy failed - select (115: Operation now in progress)

Cannot update apt https repositories via corporate proxy (“reading from proxy failed”) on Debian 10 buster

Solution: bump to apt-cacher-ng=3.5-3 from debian-bullseye.