The NetworkManager is a tool for managing network connection on Linux Fedora 9, but sometimes the NetwokManager can cause conflict for other services. The step by step example below use the ntsysv runlevel configuration tools to disable Network Manager from automatically start on boot up.
1. Invoke ntsysv tool:
[root@fedora ~]# ntsysv
The ntsysv tool interface display all service available and service that start on boot up of the Linux Fedora:
2. Find the NetworkManager ... The asterisk mark [*] define that the NetworkManager is enable on the system startup for current runlevel... remove the asterisk [*] mark on the NetworkManager hitting the space bar key.
3 Then use the Tab key to navigate to the OK button... and then hit the Enter key to save the runlevel configuration and exit the ntsysv tool.
Note: The ntsysv command above is executed on Linux Fedora 9 to disable Network Manager services from automatically start.