[- root -]:[-  ./nagios /usr/local/nagios/etc/nagios.cfg start

Nagios 3.0.1
Copyright (c) 1999-2008 Ethan Galstad (http://www.nagios.org)
Last Modified: 04-01-2008
License: GPL

Nagios 3.0.1 starting... (PID=3225)
Local time is Thu Apr 24 10:10:10 EDT 2008
Warning: Nothing specified for illegal_macro_output_chars variable!
Error: Could not create external command file '/usr/local/nagios/var/rw/nagios.cmd' as named pipe: (2) -> No such file or directory.  If this file already exists and you are sure that another copy of Nagios is not running, you should delete this file.
Bailing out due to errors encountered while trying to initialize the external command file... (PID=3225)