Reviewing Inittab and Boot Scripts

The inittab file /etc/inittab also describes which processes are started at bootup and during normal operation. For example, Oracle uses it to start cluster services at bootup. Therefore, it is recommended to ensure that all entries in /etc/inittab are legitimate in your environment.

I would at least remove the CTRL-ALT-DELETE trap entry to prevent accidental reboots:

# sed -i 's/ca::ctrlaltdel:/#ca::ctrlaltdel:/g'


The default runlevel should be set to 3 since in my opinion X11 (X Windows System) should not be running on a production server. In fact, it shouldn't even be installed.

# grep ':initdefault' /etc/inittab
id:3:initdefault:
#

And depending on your environment you might want to comment out the UPS entries as well.

To have changes in /etc/inittab become effective immediately, you can run:

# init q


The /etc/rc.local script is used for commands or startup scripts which are pertinent only to a specific server. (/etc/rc.local is a link to /etc/rc.d/rc.local).
Ensure that all startup scripts in /etc/rc.d/rc.local are legitimate.