版本：11gr1 - 11.1.0.6
在通过OUI(Oracle Universal Installer)进行安装之前，或者说以Silent方式进行安装之前，已经进行了操作系统方面的配置，如果要保证在通过OUI进行安装的过程中，不中断，不出现问题，要对这些配置进行检查，看配置是否正确，及时修正，才能确保安装过程中，不进行反复的修改。
简单来说，就是安装Oracle需要的必要条件的检查。
1. 解压软件包linux.x64_11gR1_database_1013.zip，最终形成的目录如下
[oracle@11gdb ~]$ ls
database linux.x64_11gR1_database_1013.zip
2. 进入database目录中
[oracle@11gdb ~]$ cd database/
[oracle@11gdb database]$ ls
doc install README response runInstaller stage welcome.html
3. 执行如下命令，进行预安装环境检查
./runInstaller-prereqchecker PREREQ_CONFIG_LOCATION=./stage/prereq -entryPointoracle.server_EE -prereqLogLoc /tmp -silent
执行输出：
[oracle@11gdb database]$ ./runInstaller-prereqchecker PREREQ_CONFIG_LOCATION=./stage/prereq -entryPoint oracle.server_EE-prereqLogLoc /tmp -silent
Starting Oracle Prerequisite Checker...
Checking Temp space: must be greater than 120 MB. Actual 5695 MB Passed
Checking swap space: must be greater than 150 MB. Actual 4094 MB Passed
Preparing to launch Oracle Universal Installer from/tmp/OraInstall2016-09-28_11-12-56AM. Please wait ...[oracle@11gdb database]$
Oracle Prerequisite Checker version Version 11.1.0.6.0 Production
Copyright (C) 1999, 2007, Oracle. All rights reserved.
Starting execution of Prerequisites...
Total No of checks: 14 #总共检查14项
Performing check for CertifiedVersions
Checking operating system requirements ... #检查操作系统的要求
Expected result: One ofenterprise-4,enterprise-5,redhat-4,redhat-5,SuSE-10,asianux-2,asianux-3
Actual Result: redhat-5
Check complete. The overall result of this check is:Passed #检查结果，通过
Check complete: Passed
========================================================
Performing check for Packages #执行操作系统软件包的检查
Checking operating system package requirements ...
Checking for make-3.81; found make-1:3.81-3.el5-x86_64. Passed
Checking for binutils-2.17.50.0.6; foundbinutils-2.17.50.0.6-26.el5-x86_64. Passed
Checking for gcc-4.1.1; found gcc-4.1.2-54.el5-x86_64. Passed
Checking for libaio-0.3.106-i386; foundlibaio-0.3.106-5-i386. Passed
Checking for libaio-0.3.106-x86_64; foundlibaio-0.3.106-5-x86_64. Passed
Checking for libaio-devel-0.3.106; foundlibaio-devel-0.3.106-5-x86_64. Passed
Checking for libstdc++-4.1.1-i386; foundlibstdc++-4.1.2-54.el5-i386. Passed
Checking for libstdc++-4.1.1-x86_64; foundlibstdc++-4.1.2-54.el5-x86_64. Passed
Checking for libstdc++-devel-4.1.1; foundlibstdc++-devel-4.1.2-54.el5-x86_64. Passed
Checking for sysstat-7.0.0; foundsysstat-7.0.2-12.el5-x86_64. Passed
Checking for libgcc-4.1.1-i386; foundlibgcc-4.1.2-54.el5-i386. Passed
Checking for libgcc-4.1.1-x86_64; foundlibgcc-4.1.2-54.el5-x86_64. Passed
Checking for elfutils-libelf-0.125; foundelfutils-libelf-0.137-3.el5-x86_64. Passed
Checking for elfutils-libelf-devel-0.125; foundelfutils-libelf-devel-0.137-3.el5-i386. Passed
Checking for glibc-common-2.5; foundglibc-common-2.5-118-x86_64. Passed
Checking for glibc-devel-2.5-i386; foundglibc-devel-2.5-118-i386. Passed
Checking for glibc-devel-2.5-x86_64; found glibc-devel-2.5-118-x86_64. Passed
Checking for gcc-c++-4.1.1; foundgcc-c++-4.1.2-54.el5-x86_64. Passed
Checking for compat-libstdc++-33-3.2.3-i386; foundcompat-libstdc++-33-3.2.3-61-i386. Passed
Checking for compat-libstdc++-33-3.2.3-x86_64; foundcompat-libstdc++-33-3.2.3-61-x86_64. Passed
Check complete. The overall result of this check is:Passed
Check complete: Passed #检查结果，通过
========================================================
Performing check for Kernel
Checking kernel parameters
Checking for semmsl=250; found semmsl=250. Passed
Checking for semmns=32000; found semmns=32000. Passed
Checking for semopm=100; found semopm=100. Passed
Checking for semmni=128; found semmni=128. Passed
Checking for shmmax=536870912; found shmmax=2147483648. Passed
Checking for shmmni=4096; found shmmni=4096. Passed
Checking for shmall=2097152; found shmall=2097152. Passed
Checking for file-max=65536; found file-max=6815744. Passed
Checking for VERSION=2.6.18; foundVERSION=2.6.18-371.el5. Passed
Checking for ip_local_port_range=1024 - 65000;ip_local_port_range=9000 - 65500. Failed<<<< #检查未通过
(注：ip_local_port_range=1024 - 65000 第1个是建议的值，第2个是实际的配置值，修改之后，重建检查)
Checking for rmem_default=4194304; rmem_default=262144. Failed <<<< #检查未通过
Checking for rmem_max=4194304; found rmem_max=4194304. Passed
Checking for wmem_default=262144; foundwmem_default=262144. Passed
Checking for wmem_max=262144; found wmem_max=1048576. Passed
Check complete. The overall result of this check is:Failed <<<<
Check complete: Failed <<<< #此处为一个检查的总结，如果有一项未通过，则整体不通过
Problem: The kernel parameters do not meet the minimumrequirements (see above).
Recommendation: Perform operating system specificinstructions to update the kernel parameters.
========================================================
Performing check for GLIBC
Checking Recommended glibc version
Expected result: ATLEAST=2.5-12
Actual Result: 2.5-118
Check complete. The overall result of this check is:Passed
Check complete: Passed
========================================================
Performing check for TotalMemory #物理内存的检查
Checking physical memory requirements ...
Expected result: 922MB
Actual Result: 2008MB
Check complete. The overall result of this check is:Passed
Check complete: Passed
========================================================
Performing check for SwapSpace #swap空间的检查
Checking available swap space requirements ...
Expected result: 3012MB
Actual Result: 4094MB
Check complete. The overall result of this check is:Passed
Check complete: Passed
========================================================
Performing check for DetectIfDHCPAssignedIP #检查网络的配置DHCP分配的IP检查
Checking Network Configuration requirements ...
Actual Result: Unknown Host Exception has Occurred:11gdb: 11gdb.
Check complete. The overall result of this check is:Not executed <<<<
Check complete: Not executed <<<<
dress in order for the Oracle Software to functionproperly. See the Installation Guide formore details on installing the software on systems configured with DHCP.
========================================================
Performing check for CheckPathForOtherOracleHomes #检查Oracle Home目录的配置
Checking PATH environment variable...
Actual Result::java.lang.NullPointerException:Exception/Error Occurred
Check complete. The overall result of this check is:Not executed <<<<
Check complete: Not executed <<<<
Recommendation: Restart the installer after removingother ORACLE_HOME locations from PATH environment variable.
========================================================
Performing check for CheckTempDiskSpace #Temp磁盘空间的检查
Checking for sufficient diskspace in TEMP location...
Check complete. The overall result of this check is:Passed
Check complete: Passed
========================================================
Performing check for CheckLdLibraryPath # LD_LIBRARY_PATH环境变量的配置检查
Checking LD_LIBRARY_PATH environment variable...
Actual Result::java.lang.NullPointerException:Exception/Error Occurred
Check complete. The overall result of this check is:Not executed <<<<
Check complete: Not executed <<<<
Recommendation: Restart the installer after removingother ORACLE_HOME locations from LD_LIBRARY_PATH environment variable.
========================================================
Performing check for OracleBase #ORACLE_BASE环境变量的配置检查
Validating ORACLE_BASE location (if set) ...
Actual Result::java.lang.NullPointerException:Exception/Error Occurred
Check complete. The overall result of this check is:Not executed <<<<
Check complete: Not executed <<<<
Recommendation: Unset the environment variable'ORACLE_BASE' or make sure it is specified as a parent of the Oracle homedirectory.
========================================================
Performing check for OracleHomeSpace #Oracle_home空间的检查
Checking Oracle Home path for spaces...
Actual Result::java.lang.NullPointerException:Exception/Error Occurred
Check complete. The overall result of this check is:Not executed <<<<
Check complete: Not executed <<<<
Recommendation: You must choose an Oracle Home paththat doesn't contain any spaces.
========================================================
Performing check for DetectAnyInvalidASMHome
Checking for proper system clean-up....
Check complete. The overall result of this check is:Passed
Check complete: Passed
========================================================
Performing check for CompatibilityChecks_DB
Checking for Oracle Home incompatibilities ....
Check complete. The overall result of this check is:Not executed <<<<
Check complete: Not executed <<<<
S_NO_ORACLE_HOME_VAR: No ORACLE_HOME variable set toperform compatibility checks.
Recommendation: Choose a new Oracle Home for installingthis product.
========================================================
PrereqChecks complete
4. 生成/tmp下的输出
-rw------- 1oracle oinstall 12530 Sep 28 11:13 prereq2016-09-28_11-12-56AM.log
drwxr-xr-x 2oracle oinstall 4096 Sep 28 11:32 logs
-rw------- 1oracle oinstall 0 Sep 28 11:32prereq2016-09-28_11-32-49AM.err
-rw------- 1oracle oinstall 7340 Sep 28 11:32 prereq2016-09-28_11-32-49AM.out
-rw------- 1oracle oinstall 12528 Sep 28 11:32 prereq2016-09-28_11-32-49AM.log
drwxr-xr-x 10 oracle oinstall 4096 Sep 28 11:32OraInstall2016-09-28_11-32-49AM
drwxr-xr-x 7oracle oinstall 4096 Sep 28 11:39OraInstall2016-09-28_11-39-31AM
drwxr-xr-x 2oracle oinstall 4096 Sep 28 11:39hsperfdata_oracle
注：
l PREREQ_CONFIG_LOCATION说明配置文件的位置(不同产品类型可能预检查配置文件的目录不同，如ASM，Cluster，Client等不同的产品)
l -entryPoint 指的是，产品类型，根据不同的产品类型，最终的进入点标识，会有区别
l -prereqLogLoc 最终生成的日志，比如，错误日志，输出日志的位置
注意：
关于ORACLE_HOME,ORACLE_BASE等环境变量的问题，可以忽略，不影响实际的安装，也就是说Check complete: Not executed<<<<即Not executed的可以忽略，但是对于Failed的要给予关注，进行修正，满足最小的安装要求。
