Hallo Paolo,
Am Fri, 9 Aug 2019 16:12:17 +0200 schrieb Paolo Benvenuto <paolobe...@gmail.com>: > > What is the result of running "munin-node" directly (as root)? > > > > # munin-node > doesn't produce any error > > after that: > > $ ps ax|grep munin > 12471 ? Ss 0:00 /usr/bin/perl -wT /usr/sbin/munin-node This is weird. The systemd service should have done the same. > and it seems that something more is executed every 5 minutes. This is a either a cron job (on the munin master) or the executed plugins on a node (being requested by the master). I still do not understand, the (trivial) systemd service should fail. Did you take a look at /var/log/munin/munin-node.log? (scrolling back to the time before your manual start) Do you have any other idea for debugging the service on your host? Otherwise I would suggest something quite low-level: add "strace -o /tmp/munin-node-service.log -f" in front of the "ExecStart" in the munin-node service file (/etc/systemd/system/multi-user.target.wants/munin-node.service). Cheers, Lars