10gR2 Installation : installation of Oracle Database 10g Release 2 (10.2.0.1) on Red Hat Enterprise Linux 5 (RHEL5).
The link is from "oracle-base". The site is very practicle and conscise; especially useful when a DBA wants to refer or refresh something "real quick" without going into concepts & theory surrounding implementation.
http://www.oracle-base.com/articles/10g/OracleDB10gR2InstallationOnRHEL5.php
Below is a post about switching from primary database to standby database. It a step by step instruction set.
Before begining to follow the instruction switch the logs
step 0) alter system switch logfile;
http://www.visi.com/~mseberg/Data_Guard_switchover.html
