grep munin-cron /etc/cron.*/*
If only one record found, than rm -rf /var/run/munin/munin-update.lock && /etc/init.d/munin-node restart
grep munin-cron /etc/cron.*/*
If only one record found, than rm -rf /var/run/munin/munin-update.lock && /etc/init.d/munin-node restart