1， Uncompress and unpack downloaded files

One step procedure (uses less disk space and is faster):
  zcat lnx_920_disk1.cpio.gz | cpio -idmv
  zcat lnx_920_disk2.cpio.gz | cpio -idmv
  zcat lnx_920_disk3.cpio.gz | cpio -idmv

Two step procedure:
  # Uncompress
       gunzip lnx_920_disk1.cpio.gz lnx_920_disk2.cpio.gz lnx_920_disk3.cpio.gz   Linux9i_Disk3.cpio.gz  
  # Unpack the downloaded files: 
  cpio -idmv < lnx_920_disk1.cpio 
  cpio -idmv < lnx_920_disk2.cpio 
  cpio -idmv < lnx_920_disk3.cpio

Now you should have 3 directories containing installation files:
Disk1
Disk2
Disk3

2， Swap space

In order to perform a typical Oracle 9i installation and to create a simple prototype database, Oracle says that you need a minimum of 512MB of RAM for the Oracle9i (9.0.1) Server, and the amount of disk space (swap space) should be equal to twice the amount of RAM or at least 400 MB, whichever is greater.

Check your memory by executing:
grep MemTotal /proc/meminfo

Check swap space by executing:
cat /proc/swaps  or  swapon –s

You can also add temporary swap space by creating a temporary swap file instead of using a raw device. Here is the procedure:

As root:
dd if=/dev/zero of=tmpswap bs=1k count=900000
chmod 600 tmpswap
mkswap tmpswap
swapon tmpswap

To disable the temporary swap space execute the following commands:

As root:
swapoff tmpswap
rm tmpswap

3， Shared Memory

I increased the shmmax setting for the kernel by executing the following command:

As root:
# cat /proc/sys/kernel/shmmax
33554432
# echo `expr 1024 \* 1024 \* 1024` > /proc/sys/kernel/shmmax

It is recommended to increase the shmmax setting permanently for Oracle. So if you want to increase the maximum shared memory size permanently, add the following line to the /etc/sysctl.conf file:
kernel.shmmax=1073741824

4，/tmp Space

The Oracle Universal Installer requires up to 400 MB of free space in the /tmp directory. If you do not have enough space in the /tmp directory,  you can temporarily create a tmp directory in another filesystem. Here is how you can do this:

As root:
mkdir /<AnotherFilesystem>/tmp
chown root.root /<AnotherFilesystem>/tmp
chmod 1777 /<AnotherFilesystem>/tmp
export TEMP=/<AnotherFilesystem>/tmp      # used by Oracle
export TMPDIR=/<AnotherFilesystem>/tmp     # used by Linux programs like the linker "ld"
 
When you are done with your Oracle installation, shutdown Oracle and remove the temporary directory:
rmdir /<AnotherFilesystem>/tmp
unset TEMP
unset TMPDIR

5，Oracle Disk Space

You will need about 2.5 GB for the database software. If you perform a typical database installation and not a customized database installation, then you will need about 3.5 GB of disk space.

6，"binutils" Issue   (if you fond following error )

Q: "Error invoking target install of makefile /opt/oracle/product/9.0.1/plsql/lib/ins_plsql.mk" 

A: This obviates the need to change binutils

download the following binutil RPM version and downgrade binutil on the Oracle server:
ftp://ftp.redhat.com/pub/redhat/linux/7.0/en/os/i386/RedHat/RPMS/binutils-2.10.0.18-1.i386.rpm
As root:
rpm -Uvh --force --nodeps binutils-2.10.0.18-1.i386.rpm
When you are done with the Oracle installation, you upgrade your binutil RPM back to the version you had before you downgraded:
E.g. on a Red Hat 7.2 server:
rpm -Uvh --force --nodeps binutils-2.11.90.0.8-9.i386.rpm

7，Development Packages (RPMs)

You will need the following RPM development packages for the Oracle installer to compile the Oracle modules etc.:
gcc
cpp
glibc-devel
compat-libstdc++
kernel-headers (on RH 7.1, 7.2, 2.1AS)
glibc-kernheaders (on RH 7.3, 8.0)
binutils

Otherwise you''''ll get an error message like:
Error in invoking target ntcontab.o of makefile /opt/oracle/product/9.2.0/network/lib/ins_net_client.mk

To find out if you have these development packages installed, execute the following command:
# rpm -q gcc cpp glibc-devel kernel-headers binutils

8，JDK

I successfully installed Oracle9iR2 without installing JDK on the system.Oracle comes now with its own Java. This means that you don''''t have to follow these steps which were required for older Oracle versions:

    Download JDK 1.3.1 or Blackdown 1.1.8_v3: (I usually used Blackdown)
      http://www.blackdown.org
      http://java.sun.com

    According to JDK documentation, install JDK under /usr/local .
       Then create a symbolic link to the JDK under /usr/local/java :

    As root:
    bzip2 -dc jdk118_v3-glibc-2.1.3.tar.bz2 | tar xf - -C /usr/local
    ln -s /usr/local/jdk118_v3 /usr/local/java

9，Create Oracle User Accounts

As root:

groupadd dba
groupadd oinstall
useradd -g oinstall -G dba oracle
passwd oracle

Oinstall is not needed when the same people will be maintaining the software and the database.  In this situation, it will create more

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