Simple Steps for installing Oracle 11g R2 (11.2.0) on RHEL5.5

Simple Steps for installing Oracle 11g R2 (11.2.0) on RHEL5.5

1) required rpm for installation:
# Rpm-Uvh
Binutils-2.17.50.0.6
Compat-libstdc ++-33-3.2.3
Elfutils-libelf-0.125
Elfutils-libelf-devel-0.125
Elfutils-libelf-devel-static-0.125
Gcc-4.1.2
Gcc-c ++-4.1.2
Glibc-2.5-24
Glibc-common-2.5
Glibc-devel-2.5
Glibc-headers-2.5
Kernel-headers-2.6.18
Ksh-20060214
Libaio-0.3.106
Libaio-devel-0.3.106
Libgcc-4.1.2
Libgomp-4.1.2
Libstdc ++ 4.1.2
Libstdc +-devel-4.1.2
Make-3.81
Sysstat-7.0.2
UnixODBC-2.2.11
UnixODBC-devel-2.2.11

2) create an installation group and a user:
# Groupadd-g 1000 oinstall
# Groupadd-g 1010 dba
# Useradd-u 1000-g oinstall-G dba oracle
# Passwd oracle

3) Create the installation directory:
# Mkdir-p/u01/app/oracle
# Chown-R oracle: oinstall/u01
# Chmod-R 755/u01

4) Adjust the kernel parameters:
# Vi/etc/sysctl. conf
Fs. aio-max-nr = 1048576
Fs. file-max = 6815744
Kernel. shmall = 2097152
Kernel. shmmax = 536870912
Kernel. shmmni = 4096
Kernel. sem = 250 32000 100 128
Net. ipv4.ip _ local_port_range = 9000 65500
Net. core. rmem_default = 262144
Net. core. rmem_max = 4194304
Net. core. wmem_default = 262144
Net. core. wmem_max = 1048576

#/Sbin/sysctl-p

5) Adjust shell running parameters:
# Vi/etc/security/limits. conf
Oracle soft nproc 2047
Hard nproc 16384
Oracle soft nofile 1024
Oracle hard nofile 65536
Oracle soft stack 10240

6) set ORACLE_BASE Environment Variables
$ Export ORACLE_BASE =/u01/app/oracle

7) Start installation:
$./RunInstaller