linux系统安装虚拟机时 要求
swap：3G
tmp:4G
主盘30G
Oracle目前最新的版本是11g R2版本，网上不少安装介绍都是9i或者10g的，我按照介绍RHEL5.5上安装Oracle 11gR2总是有问题，之后看官方文档介绍了，在光盘的doc目录下有。
Oracle 11g R2数据库安装硬件配置要求：
最小内存 1 GB of RAM
虚拟内存容量
Oracle Database 11g Release 2 (11.2) for Linux x86:
Asianux 2.0
Asianux 3.0
Oracle Enterprise Linux 4.0 Update 7 or later
Oracle Enterprise Linux 5.0
Red Hat Enterprise Linux 4.0 Update 7 or later
Red Hat Enterprise Linux 5.0
SUSE Linux Enterprise Server 10.0
SUSE Linux Enterprise Server 11.0
需要的软件包支持：
这里只列出Asianux 3, Oracle Enterprise Linux 5.0, and Red Hat Enterprise Linux 5.0的要求，检查一下系统是否安装过这些包，没有的话在Redhat的光盘上都有。
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
创建Oracle用户
The Oracle Inventory group (typically, oinstall)
The OSDBA group (typically, dba)
The Oracle software owner (typically, oracle)
The OSOPER group (optional. Typically, oper)
# /usr/sbin/groupadd oinstall
# /usr/sbin/groupadd dba
# /usr/sbin/useradd -g oinstall -G dba oracle
# passwd oracle
修改内核参数
修改 /etc/sysctl.conf 文件，加上如下参数
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 = 1048586
应用配置
# /sbin/sysctl -p
修改用户限制
修改 /etc/security/limits.conf 文件，加上下面的参数
oracle soft nproc 2047
oracle hard nproc 16384
oracle soft nofile 1024
oracle hard nofile 65536
修改用户验证选项
修改/etc/pam.d/login文件加上如下参数
session required pam_limits.so
修改用户配置文件
修改/etc/profile文件加入如下参数：
if [ $USER = “oracle” ]; then
if [ $SHELL = “/bin/ksh” ]; then
ulimit -p 16384
ulimit -n 65536
else
ulimit -u 16384 -n 65536
fi
fi
安装目录配置
# mkdir -p /u01/
# chown -R oracle:oinstall /u01/
# chmod -R 775 /u01/
修改用户bash shell
$ vi .bash_profile
增加
export ORACLE_BASE=/u01/app
export ORACLE_HOME=$ORACLE_BASE/oracle
export ORACLE_SID=liusuping
export PATH=$ORACLE_HOME/bin:$PATH:$HOME/bin
startx启动图形界面进入安装目录
配置图形界面
$ xhost fully_qualified_remote_host_name
$ xhost localhost
切换安装用户
su orcale
执行安装
./runInstaller
安装完毕后用root用户执行两个脚本
[root@c app]# /u01/app/oraInventory/orainstRoot.sh
更改权限/u01/app/oraInventory.
添加组的读取和写入权限。
删除全局的读取, 写入和执行权限。
更改组名/u01/app/oraInventory 到 oinstall.
脚本的执行已完成。[root@c app]# /u01/app/oracle/product/11.2.0/dbhome_2/root.sh
Running Oracle 11g root.sh script…
The following environment variables are set as:
ORACLE_OWNER= oracle
ORACLE_HOME= /u01/app/oracle/product/11.2.0/dbhome_2
Enter the full pathname of the local bin directory: [/usr/local/bin]:
Copying dbhome to /usr/local/bin …
Copying oraenv to /usr/local/bin …
Copying coraenv to /usr/local/bin …
Creating /etc/oratab file…
Entries will be added to the /etc/oratab file as needed by
Database Configuration Assistant when a database is created
Finished running generic part of root.sh script.
Now product-specific root actions will be performed.
Finished product-specific root actions.
[root@c app]#