BOOT LOG FILE
=============
/var/log/boot.log



RUNLEVELS
=========
Runlevel   Description
       0   Used to halt the system. This runlevel is reserved and cannot be changed.
       1   Used to run in a single-user mode. This runlevel is reserved and cannot be changed.
       2   Not used by default. You are free to define it yourself.
       3   Used to run in a full multi-user mode with a command-line user interface.
       4   Not used by default. You are free to define it yourself.
       5   Used to run in a full multi-user mode with a graphical user interface.
       6   Used to reboot the system. This runlevel is reserved and cannot be changed. 



CHKCONFIG
=========
chkconfig --list
chkconfig <service> on --level 35      # (Sample to enable the service <service> in runlevels 3 and 5)
chkconfig --add oracle-db
chkconfig --del oracle-db



ORACLE
======
/etc/rc.d/init.d/oracle-db