How to install oracle10gr2 on Linux

Here are our installation environment and steps:
Hardware:
  CPU: 1Unit Intel(R) Pentium(R) 4 CPU 2.80GHz
  Memory: 2G recommend, 1G at least
  Disk: two disks recommend, total volume 150G – 200G
  Oracle installation path: /opt/oracle10g
Sofeware:
  OS: Red Hat Enterprise Linux ES release 3 (Taroon Update 5)
  Linux 2.4.21-32.ELsmp (kernal version)
  Oracle: Oracle Database 10g Release 10.2.0.1.0 – Production
Step1. Download oracle package
Download Oracle10.2.0.1 for Linux [...]