The lock file is created upon startup of Nagios and deleted when Nagios stops, so the fact that the file doesn't exist simply means that Nagios isn't running. I believe this prevents multiple instances of Nagios from running on the box. Check your permissions to the /usr/local/nagios/var directory. Is it possible you have them set so that Nagios can't write to that directory?
Edited Wed Jan 04 2006, 08:37PM ]