redhat7 安装11g rac数据库会遇到多个问题，本文列出了常见问题和处理方法。

1 RHEL7中缺少包compat-libstdc++

（可以在RHEL6中找到，建议安装）

Installation of 12.1.0.2 Oracle Database Server/Client on RHEL 7/OL7 reports pre-requisite package 'compat-libstdc++' missing. (文档 ID 2062336.1)

SOLUTION:

compat-libstdc++-33-3.2.3 is still required due to bug 22477834.

Install the compat-libstdc++-33-3.2.3 and Proceed with the Database Installation.

2 执行root.sh 报错

Adding Clusterware entries to inittabohasd failed to startFailed to start the Clusterware. Last 20 lines of the alert log follow: 2018-08-13 10:23:57.571: [client(58661)]CRS-2101:The OLR was formatted using version 3

需要安装补丁（p18370031_112040_Linux-x86-64.zip，p19404309_112040_Linux-x86-64.zip）

0201：软件安装之前，安装 p19404309_112040_Linux-x86-64.zip  ：[grid@prod04 rhel7 11204 patch]$ unzip p19404309_112040_Linux-x86-64.zip [grid@prod04 rhel7 11204 patch]$  cp b19404309/grid/cvu_prereq.xml /soft/grid/stage/cvu/（安装软件包位置） 0202：执行root.sh 之前，在所有节点安装p18370031_112040_Linux-x86-64.zip：grid@prod04 rhel7 11204 patch]$ unzip p18370031_112040_Linux-x86-64.zip ^C[grid@prod04 rhel7 11204 patch]$ cd 18370031/          [grid@prod04 18370031]$ /u01/app/11.2.0/grid/OPatch/opatch applyOracle Interim Patch Installer version 11.2.0.3.4Copyright (c) 2012, Oracle Corporation.  All rights reserved.Oracle Home       : /u01/app/11.2.0/gridCentral Inventory : /u01/app/oraInventory   from           : /u01/app/11.2.0/grid/oraInst.locOPatch version    : 11.2.0.3.4OUI version       : 11.2.0.4.0Log file location : /u01/app/11.2.0/grid/cfgtoollogs/opatch/18370031_Aug_13_2018_11_02_32/apply2018-08-13_11-02-32AM_1.logApplying interim patch '18370031' to OH '/u01/app/11.2.0/grid'Verifying environment and performing prerequisite checks...All checks passed.Please shutdown Oracle instances running out of this ORACLE_HOME on the local system.(Oracle Home = '/u01/app/11.2.0/grid')Is the local system ready for patching? [y|n]yUser Responded with: YBacking up files...Patching component oracle.crs, 11.2.0.4.0...Verifying the update...Patch 18370031 successfully appliedLog file location: /u01/app/11.2.0/grid/cfgtoollogs/opatch/18370031_Aug_13_2018_11_02_32/apply2018-08-13_11-02-32AM_1.logOPatch succeeded.

3 Error in invoking target 'agent nmhs' of makefile

error in invoking target 'agent nmhs' of make file ins_emagent.mk while installing Oracle 11.2.0.4 on Linux (文档 ID 2299494.1)

SOLUTION:

Edit $ORACLE_HOME/sysman/lib/ins_emagent.mk, search for the line

$(MK_EMAGENT_NMECTL)

Then replace the line with

$(MK_EMAGENT_NMECTL) -lnnz11

Then click “Retry” button to continue.