这两天一同事让帮忙搭建一个oracle环境，为了省事就写了一个oracle的安装脚本。该脚本在RHEL 6.X x64环境下安装oracle 11g R2 x64测试通过，参数设置参照oracle的oracle 11G for Linux安装向导.pdf设置。

注：如果安装Oracle_Linux,需要修改脚本中yum源的配置的公钥。


#!/bin/bash
# oracle 11g R2 for linux 安装辅助脚本
# Redkey
# version 1.2
# date 2013.08.27
#定义常量
SYSCTL=/etc/sysctl.conf
LIMITS=/etc/security/limits.conf
PAM=/etc/pam.d/login
PROFILE=/etc/profile
BASH_PROFILE=/home/oracle/.bash_profile
#循环变量
i=1
#定义显示颜色
#颜色定义 信息(33×××) 警示(31红色) 过程(36浅蓝)
#判断执行用户是否root
isroot()
{
    if [ $USER != "root" ];then
        echo -e "\n\e[1;31m the user must be root,and now you user is $USER,please su to root. \e[0m"
        exit4
    else
        echo -e "\n\e[1;36m check root ... OK! \e[0m"
    fi
}
#挂在光盘到/mnt/cdrom目录下
mount_cdrom()
{
echo -e "\n\e[1;31m please insert RHEL to CDROM,press any key ...\e[0m"
read -n 1
if [ -d /mnt/cdrom ];then
     mount -t auto -o ro /dev/cdrom /mnt/cdrom
else
    mkdir -p /mnt/cdrom
    mount -t auto -o ro /dev/cdrom /mnt/cdrom
fi
if [ $? -eq 0 ];then
    echo -e "\n\e[1;36m CDROM mount on /mnt/cdrom ... OK! \e[0m"
fi
}
#设置yum本地光盘源
yum_repo()
{
    rm -rf /etc/yum.repos.d/* && cat <<EOF >> /etc/yum.repos.d/Server.repo
[Server]
name=MyRPM
baseurl=file:///mnt/cdrom/Server
enabled=1
gpgkey=file:///mnt/cdrom/RPM-GPG-KEY-redhat-release
EOF
if [ $? -eq 0 ];then
echo -e "\n\e[1;36m  /etc/yum.repos.d/Server.repo  ... OK! \e[0m"
fi
}
#添加oracle用户，添加oracle用户所属组oinstall及附加组dba
ouseradd()
{
    if [[ `grep "oracle" /etc/passwd` != "" ]];then
    userdel -r oracle
    fi
    if [[ `grep "oinstall" /etc/group` = "" ]];then
        groupadd oinstall
    fi
    if [[ `grep "dba" /etc/group` = "" ]];then
        groupadd dba
    fi
    useradd oracle -g oinstall -G dba && echo $1 |passwd oracle --stdin
    if [ $? -eq 0 ];then
        echo -e "\n\e[1;36m oracle's password updated successfully  --- OK! \e[0m"
    else
        echo -e "\n\e[1;31m oracle's password set faild.   --- NO!\e[0m"
    fi
}
#检查oracle所需软件包并安装
packagecheck()
{
for package in binutils compat-libcap1 compat-libstdc++ gcc gcc-c++ glibc glibc-devel ksh libgcc libstdc++ libstdc++-devel libaio libaio-devel make sysstat
do
    rpm -q $package 2> /dev/null
    if [ $? != 0 ];then
        yum -y install $package
        echo  -e "\n\e[1;36m $package is already installed ... OK! \e[0m"
    fi
done
}
#安装桌面套件 X Window System / Desktop
xdesk()
{
    LANG=C yum -y groupinstall "X Window System" "Desktop"
    if [ $? -eq 0 ];then
        echo  -e "\n\e[1;36m $package is already installed ... OK! \e[0m"
    fi
}
# 设置内核参数
kernelset()
{
    cp $SYSCTL{,.bak} && cat <<EOF >>$SYSCTL
fs.aio-max-nr = 1048576
fs.file-max = 6815744
kernel.shmall = 2097152
kernel.shmmax = 4294967295
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 = 1048575
EOF
    if [ $? -eq 0 ];then
        echo -e "\n\e[1;36m kernel parameters updated successfully --- OK! \e[0m"
    fi
sysctl -p
}
#设置oracle资源限制
oralimit()
{
    cp $LIMITS{,.bak} && cat <<EOF >> $LIMITS
oracle      soft    nproc   2047
oracle      hard    nproc   16384
oracle      soft    nofile  1024
oracle      hard    nofile  65536
oracle      soft    stack   10240
EOF
    if [ $? -eq 0 ];then
        echo  -e "\n\e[1;36m $LIMITS updated successfully ... OK! \e[0m"
    fi
}
#设置login文件
setlogin()
{
    cp $PAM{,.bak} && cat <<EOF >>$PAM
session     required    pam_limits.so
EOF
    if [ $? -eq 0 ];then
        echo -e "\n\e[1;36m  $PAM updated successfully ... OK! \e[0m"
    fi
}
#设置profile文件
setprofile()
{
    cp $PROFILE{,.bak} && cat <<EOF >>$PROFILE
if [ $USER = "oracle" ];then
    if [ $SHELL = "/bin/ksh" ];then
        ulimit -p 16384
        ulimit -n 65536
    else
        ulimit -u 16384 -n 65536
    fi
fi
EOF
    if [ $? -eq 0 ];then
        echo -e "\n\e[1;36m  $PROFILE updated successfully ... OK! \e[0m"
    fi
}
#设置oracle的profile文件
setbash_profile()
{
    cp $BASH_PROFILE{,.bak} && cat <<EOF >> $BASH_PROFILE
umask 022
ORACLE_BASE=$1
ORACLE_HOME=$ORACLE_BASE/oracle
ORACLE_SID=$2
PATH=$ORACLE_HOME/bin/:$PATH
LANG=en_US.UTF-8
export ORACLE_BASE ORACLE_HOME ORACLE_SID
EOF
    if [ $? -eq 0 ];then
        echo -e "\n\e[1;36m $BASH_PROFILE updated successfully ... OK! \e[0m"
    fi
. $BASH_PROFILE
}
#系统环境检查
oscheck()
{
#查看内存大小是否大于1G
echo -e "\n check MEM Size ..."
if [ `cat /proc/meminfo | grep MemTotal | awk '{print $2}'` -lt 1048576 ];then
    echo  -e "\n\e[1;33m Memory Small \e[0m"
    exit 1
else
    echo -e "\n\e[1;36m Memory checked PASS \e[0m"
fi
#查看tmp空间大小
echo -e "\n check tmpfs Size ..."
cp /etc/fstab{,.bak}
while true;do
if [ `df | awk '/tmpfs/ {print $2}'` -lt 1048576 ];then
    echo -e "\n\e[1;33m tmpfs Smaill \e[0m"
    sed -i '/tmpfs/s/defaults/defaults,size=1G/' /etc/fstab && mount -o remount /dev/shm
    if [ $? != 0 ];then
    i=i+1
        if [ $i -eq 3 ];then
            echo -e "\n\e[1;31m set tmpfs faild. \e[0m"
            exit 3
        fi
    else
        echo -e "\n\e[1;36 tmpfs updated successfully. \e[0m"
        break
    fi
else
    echo -e "\n\e[1;36m tmpfs checked PASS \e[0m"
    break
fi
done
}
#停止防火墙IPTABLES
service iptables stop
chkconfig iptables off
#关闭SELINUX
cp /etc/selinux/config{,.bak} && sed -i '/SELINUX/s/enforcing/disabled/;/SELINUX/s/permissive/disabled/'   /etc/selinux/config
setenforce 0
#执行以上函数
isroot
oscheck
yum_repo
mount_cdrom
packagecheck
xdesk
kernelset
oralimit
setlogin
setprofile
echo -e "\n\e[1;33m please input oracle's user passwd: \e[0m"
read oraclepw
ouseradd $oraclepw
setbash_profile
echo -e "\n\e[1;33m please input oracle install PATH(default /oracle/db) \e[0m"
read oraclepath
if [ -z $oraclepath ];then
    oraclepath=/oracle/db
fi
echo -e "\n\e[1;33m  please input oracle_sid (default fxcx) \e[0m"
read orasid
if [ -z orasid ];then
    orasid=fxcx
fi
setbash_profile $oraclepath $orasid
mkdir -p $oraclepath && chown -R oracle:oinstall $oraclepath && chmod -R 755 $oraclepath
unset i
echo -e "\n\e[1;35m Oracle install pre-setting finish! && please run oracle installer as user oracle \e[0m"