install oracle on linux

groupadd oinstall
groupadd dba

mkdir -p /home/oracle /u01

useradd -d /home/oracle -g oinstall -G dba oracle

chown oracle:dba /home/oracle /u01

passwd oracle

vi /home/oracle/.bash_profile

export PS1="`/bin/hostname -s`->"
export EDITOR=vi
export ORACLE_SID=orcl
export ORACLE_BASE=/u01/app/oracle
export ORACLE_HOME=/u01/app/oracle/product/10.2.0/db_1
export LD_LIBRARY_PATH=$ORACLE_HOME/lib
export PATH=$ORACLE_HOME/bin:/bin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/X11R6/bin
umask 022

if [ $USER = "oracle" ]; then
if [ $SHELL = "/bin/ksh" ]; then
ulimit -p 16384
ulimit -n 65536
else
ulimit -u 16384 -n 65536
fi
fi

vi /etc/security/limits.conf
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536

vi /etc/pam.d/login
session required /lib/security/pam_limits.so

vi /etc/sysctl.conf
kernel.shmall = 2097152
kernel.shmmax = 2147483648
kernel.shmmni = 4096
kernel.sem = 250 32000 100 128
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000
net.core.rmem_default = 1048576
net.core.rmem_max = 1048576
net.core.wmem_default = 262144
net.core.wmem_max = 262144

vi /etc/hosts
127.0.0.1 oracle10g

oracle:

mkdir -p $ORACLE_BASE/admin
mkdir -p $ORACLE_HOME
mkdir -p /u01/oradata/orcl/log