where can I modify bootup screen in cetos. I runs different messages while booting up and I need to modiy it. thanks
Normally hiding the boot messages requires recompiling the kernel, so that you can start the OS in kernel quiet mode. Lately, there are some tools which enable you to do it without recompiling the kernel
you can check splashy http://splashy.alioth.debian.org/wiki/installation
or google "fbsplash"