1、软件包要求：
在安装Oracle 11gR2前，需要先安装以下软件包。
查看系统那些包没有安装：
[root@linscora ~]# yum list compat-libstdc++-33 elfutils-libelf elfutils-libelf-devel glibc.i686 glibc-devel glibc-common gcc gcc-c++ libgcc libaio libaio-devel libstdc++ libstdc++-devel unixODBC unixODBC-devel sysstat binutils make
Loaded plugins: rhnplugin, security
This system is not registered with RHN.
RHN support will be disabled.
Installed Packages
binutils.i386 2.17.50.0.6-12.el5 installed
elfutils-libelf.i386 0.137-3.el5 installed
glibc-common.i386 2.5-42 installed
libaio.i386 0.3.106-3.2 installed
libgcc.i386 4.1.2-46.el5 installed
libstdc++.i386 4.1.2-46.el5 installed
make.i386 1:3.81-3.el5 installed
Available Packages
compat-libstdc++-33.i386 3.2.3-61 rh436
elfutils-libelf-devel.i386 0.137-3.el5 rh436
gcc.i386 4.1.2-46.el5 rh436
gcc-c++.i386 4.1.2-46.el5 rh436
glibc.i686 2.5-42 rh436
glibc-devel.i386 2.5-42 rh436
libaio-devel.i386 0.3.106-3.2 rh436
libstdc++-devel.i386 4.1.2-46.el5 rh436
sysstat.i386 7.0.2-3.el5 rh436
unixODBC.i386 2.2.11-7.1 rh436
unixODBC-devel.i386 2.2.11-7.1 rh436
installed 表示已经安装的包，rh436表示没有安装的包。（rh436是我仓库定义的一个名字）
[root@linscora ~]# cat /etc/yum.repos.d/rh436.repo
[rh436] ＃就是这个定义的
name=rh436
baseurl=
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[rh436-vt]
name=rh436-vt
baseurl=
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[rh436-cluster]
name=rh436-cluster
baseurl=
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[rh436-cluster-storage]
name=rh436-cluster-storage
baseurl=
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
[rh436-updates]
name=rh436-updates
baseurl=
enabled=0
gpgcheck=0
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-redhat-release
下面用yum安装这些末安装的包：
yum list compat-libstdc++-33 elfutils-libelf elfutils-libelf-devel
glibc glibc-devel glibc-common gcc gcc-c++ libgcc libaio libaio-devel
libstdc++ libstdc++-devel unixODBC unixODBC-devel sysstat binutils make
2、安装前的配置：
（1）创建oracle用户和oinstall、dba用户组
[root@linscora ~]# echo $SHELL
/bin/bash
[root@linscora ~]# groupadd oinstall
[root@linscora ~]# groupadd dba
[root@linscora ~]# useradd -m -g oinstall -G dba oracle
[root@linscora ~]# id oracle
uid=500(oracle) gid=500(oinstall) groups=500(oinstall),501(dba)
[root@linscora ~]# passwd oracle
Changing password for user oracle.
New UNIX password:
BAD PASSWORD: it is based on a dictionary word
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
（2）创建Oracle的安装目录。
[root@linscora ~]# mkdir -p /u01/app/oracle
[root@linscora ~]# chown -R oracle.oinstall /u
[root@linscora ~]# chown -R oracle.oinstall /u01/app/
[root@linscora ~]# chmod -R 775 /u01/app/
（3）更改系统的核心参数，以满足Oracle 11g的安装最小参数要求。
[root@linscora ~]# cat >> /etc/sysctl.conf <> kernel.shmmni = 4096
> kernel.sem = 250 32000 100 250 250
> fs.file-max = 6815744
> net.ipv4.ip_local_port_range = 9000 65500
> net.core.rmem_default = 4194304
> net.core.wmem_default = 262144
> net.core.rmem_max = 4194304
> net.core.wmem_max = 1048576
>fs.aio-max-nr = 1048576
> EOF
使参数生效：
[root@linscora ~]# sysctl -p
(4)为oracle用户设置可使用的文件和进程数限制。
[root@linscora ~]# cat >> /etc/security/limits.conf <> oracle soft nproc 2047
> oracle hard nproc 16384
> oracle soft nofile 1024
> oracle hard nofile 65536
> EOF
[root@linscora ~]# cat >> /etc/pam.d/login <> session required /lib/security/pam_limits.so
> EOF
（5）更改bash、ksh、及cshell的默认profile文件的内容。
[root@linscora ~]# cat >> /etc/profile <> if [ \$USER = "oracle" ]; then
> if [ \$SHELL = "/bin/ksh" ];
> then
> ulimit -p 16384
> ulimit -n 65536
> else
> ulimit -u 16384 -n 65536
> fi
> umask 022
> fi
> EOF
[root@linscora ~]# cat >> /etc/csh.login <> if ( \$USER == "oracle") then
> limit maxproc 16384
> limit descriptors 65536
> umask 022
> endif
> EOF
(6)
允许所有客户端连接X服务器。
[root@linscora ~]# xhost +
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