Package: mrtg Version: 2.17.8+git20211109.9205d1d-1 Severity: important MRTG no longer needs to use cron because it is starting in Debian via systemd/init.d scripts. However, after migrating to new versions under systemd, a file called /etc/cron.d/mrtg is being kept. This file will make a duplicate work because MRTG now runs as a daemon.
Eriberto