Hi there. I had installed nagios, it was working great, until i upgraded from ubuntu 8.10 to 9.04, I think the up-gradation might be he reason of the nagios not running. I have removed the nagios and reinstalled as guided in the QuickStartGuide. But the problem still remains. Also see this ---> root@biebo-laptop:/usr/local/nagios/var# service nagios start Starting nagios: done. root@biebo-laptop:/usr/local/nagios/var# service nagios status nagios is not running ---------------------- the log file -----> root@biebo-laptop:/usr/local/nagios/var# cat nagios.log [1245339292] Nagios 3.1.0 starting... (PID=25252) [1245339292] Local time is Thu Jun 18 21:34:52 PKST 2009 [1245339292] LOG VERSION: 2.0 [1245339292] Finished daemonizing... (New PID=25256) [1245339380] Nagios 3.1.0 starting... (PID=25440) [1245339380] Local time is Thu Jun 18 21:36:20 PKST 2009 [1245339380] LOG VERSION: 2.0 [1245339380] Finished daemonizing... (New PID=25443) [1245341109] Nagios 3.1.0 starting... (PID=26592) [1245341109] Local time is Thu Jun 18 22:05:09 PKST 2009 [1245341109] LOG VERSION: 2.0 [1245341109] Finished daemonizing... (New PID=26597) ------------------------ I donot know why it stops by itself. Or it not starts correctly. Please help me with this. Thanks -- Bibrak Qamar NUST-SEECS