Hi Martin, Thanks for the bug report.
As far as I understand from upstream, the correct way to run (debug) plugins from the command line is to run them via munin-run, like so: munin-run load munin-run sets up the *exact* same environment which is run when the plugin gets executed by munin-node. This means that the environment variables are set (including $MUNIN_LIBDIR), but also other aspects, like running with the user id specified in the munin-node configuration for the particular plugin, snmp values if it's an smnp plugin, and the ability to run it in debug mode via: munin-run load --debug More details at: http://munin-monitoring.org/wiki/Debugging_Munin_plugins I can add a note in README.debian to clarify this issue if you think it's needed. Regards, Tom Feiner
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