Just after the S there is a number, for example 04, this stands for the order in which those scripts are executed in that level.So in a nutshell: if you have a script called clocksync place it in /etc/init.d and symlink it with: # ln -s /etc/init.d/clocksync /etc/rc.d/rc5.d/S90clocksync This way you are sure it will start at the end of the bootup in runlevel 5 . . . . . ( make sure the /etc/ini