I’m having similiar problems as another user on this forum has listed. I have no errors being generated that I can find (apache.log, nagios.log, etc). I can log into Nagios and get to the home page but when I click on any of the links that invokes a CGI, it give the following error message: “Error: Could not open command file” . There are several threads on the web indicating permission issues with the nagios.log file. It would seem I would get errors in the log files if Nagios couldn’t access the files it needs to run properly. What am I missing?