Hi,
Just reporting my encounter with: Nov 22 23:00:12 dussel apt-cacher-ng[7362]: Check the permissions of /var/cache/apt-cacher-ng! Nov 22 23:00:12 dussel systemd[1]: apt-cacher-ng.service: main process exited, code=exited, status=1/FAILURE Nov 22 23:00:12 dussel systemd[1]: Failed to start Apt-Cacher NG software download proxy. -- Subject: Unit apt-cacher-ng.service has failed My problem was that /var/cache/apt-cacher-ng was from user root, not from apt-cacher-ng user. Fixed by manual removing /var/cache/apt-cacher-ng and let dpkg -i it create. Groeten Geert Stappers -- Leven en laten leven