In today’s post I will cover things you need to install Oracle Apps 11i ( on Linux.

1. Software for Oracle 11i can be downloaded from zip files) or you can order disks via metalink account.
2. Unzip these files and this should create five directory startCD, oraAppDB, oraApps, oraDB, oraiAS

O. S. Requirement
1.  Linux Package : make sure you have ar, gcc, g++, ld, ksh, make, X Display Server
2. Disk Space : 26 GB for Application Tier & 65 GB for Vision Database (31 GB for fresh database). Hence total 57 GB for fresh DB & 91 GB for Vision Instance.
3. If you are installing apps from Staging area you need another 24GB (No need if you are doing install from inserting CD’s on prompt)
4. O.S. User : Create two operating system user, avis11i (Application Tier) & ovis11i (Database Tier) both belonging to group DBA. You can use single user as well for both Application Tier & Database Tier
5. JDK : No need to install JDK 1.4.2 on solaris, Linux or windows as 11i Installer will install it. For other operating system you need to install JDK 1.4.2 
6. For full list of RPM’s required on Red Hat Enterprise Linux Visit Metalink Note # 303859.1

Things you must do/know before installation
A) set environment variable LD_ASSUME_KERNEL=2.4.19 for root user
B) gcc -v  (Should be of version 3.2.x) For any other version
mv /usr/bin/gcc /usr/bin/gcc.orig
mv /usr/bin/g++ /usr/bin/g++.orig
ln -s /usr/bin/i386-redhat-linux-gcc32 /usr/bin/gcc
ln -s /usr/bin/i386-redhat-linux-g++32 /usr/bin/g++

C) If your installation fail some time restart installation by option restart like 
rapidwiz -restart
D) If you try to access apps from linux machine from browser other than Mozilla (like KDE)you will get error message that “You have insufficient privileges for current operation
E) Installer should be started from root user

Starting Installation 
1. Go to Staging directory /stage_location/startCD/Disk1/rapidwiz/
2. ./rapidwiz
3. Create base directory under which you wish to install database & apps tier with proper permission (owner) (Five main directory – [SID]appl,[SID]comn,[SID]ora owned by application user (avis11i) & [SID]db, [SID]data owned by database o.s. user (ovis11i) )
Post Install
1. Set environment variable in O.S. user profile
/install_base/[sid]appl/APPSORA.env   (For Application Tier User, avis11i)
/install_base/[sid]db/SID_hostname.env   (For Application Tier User, ovis11i)

2. For start/stop services of Oracle Apps 11i visit
11i Startup/Shutdown Scripts

Error/Issues during 11i Install 
Issue :
RW-50004: Error code received when running external process. Check log file for details. Running Database Install Drivers for VIS Database

Check Logsat : $install_base/[sid]db/9.2.0/appsutil/log/[SID]_[hostname]/MMDDHHMM.log
Error while running, log for at $install_base/[sid]db /9.2.0/install/make.log
In make.log file : undefined reference to `dl_iterate_phdr@GLIBC_2.2.4`

: This issue is very well explained in Note : 363600.1 ‘dl_iterate_phdr@GLIBC_2.2.4′Error on Linux Running Rapidwiz

303859.1  Requirements for Installing Oracle 9iR2 on RHEL 4
11i Install Guide from Oracle