To get a good picture on what I currently have, here's an inventory of hardware and software:
HARDWARE:
IBM x346 2-way dual core processor with 4 GB RAM and 100+ GB disk
SOFTWARE:
Oracle 10.2.0.2.0
SAP Solution Manager 4.0 SR2
Redhat Linux Enterprise Edition Release 4
First off is the installation guide. Download the Inst. Guide SAP Solution Manager 4.0 SR2 Linux - Oracle PDF file from http://service.sap.com/instguides > SAP Components > SAP Solution Manager > Release 4.0
For the system variant to be used, I am going to use the Central System (all instance in one host).

For the Basic SAP System Parameters, here's the values I choosed:
SAP System ID: SSM
Database ID: SSM
Instance Number: 00
Name of Instance Host: sap23
SLD Destination: sap23
Code Page: Unicode
Other parameters not mentioned above are set to default values.
To check if the hardware and software requirements meets the requirements, make sure that all items mentioned under Requirements for Linux (page 43) as well as Requirements for Central System (page 45) are satisfied. You can also run the Installation Prerequisite Checker that is part of the sapinst. I also used the script mentioned in Oracle Metalink Note 309401.1. The script will perform a series of checks from CPU, OS version, swap space, installed RPMs and a lot more.
For the file system, make sure that the following file system is set properly:

Recommended sizes are indicated in page 57. For the oracle file system, check page 60.
For the Java Development Kit, I used the one from IBM as mentioned in SAP Note 861215. If you use a different platform, check SAP Note 709140.
I normally put the installation cds to the disk so that I don't mount/unmount the cd drive during the installation. Here's the items that I normally copy to their corresponding folders in the disk:
Oracle 10g RDBMS CD - /extra/solman/ora_rdbms
Oracle 10g Client - /extra/solman/ora_client
Oracle 10g Patch - /extra/solman/ora_patch
Solution Manager 4.0 SR2 Export CDs - /extra/solman/export
Solution Manager 4.0 SR2 Installation Master Linux - /extra/solman/master
Solution Manager 4.0 SR2 Java Component - /extra/solman/JAVA
NW 2004s SR2 UC-Kernel 7.00 Linux on x86_64 64bit - /extra/solman/kernel

