/usr/bin/munin-cron is in munin 1.4.6-3ubuntu3.4.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #!/bin/sh
# This used to test if the executables were installed. But that is
# perfectly redundant and supresses errors that the admin should see.
/usr/share/munin/munin-update $@ || exit 1
# The result of munin-limits is needed by munin-html but not by
# munin-graph. So run it in the background now, it will be done
# before munin-graph.
/usr/share/munin/munin-limits $@ &
nice /usr/share/munin/munin-graph --cron $@ 2>&1 |
fgrep -v "*** attempt to put segment in horiz list twice"
wait
nice /usr/share/munin/munin-html $@ || exit 1
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