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Lesson 3Locating Oracle Home
Objective Find your Oracle Home directory.
Understanding Oracle Home
Next we are going to discuss the Oracle Home directory.
When you install Oracle software, you end up with a large directory structure that contains all the executables and other files that make Oracle work. All these directories sit under one top-level directory referred to as the Oracle Home directory. The diagram below shows some of the directories that you might find in a typical installation. Move your mouse over the diagram to learn about each directory:
Directories Oracle Home
Finding your Oracle Home
If you are running the UNIX operating system, you will have an environment variable named ORACLE_HOME that points to the top-level Oracle directory. You can make that directory your current working directory by issuing the following command:

If you are running Oracle8 software under Windows, and if you accepted all the defaults when first installing Oracle, your home directory will be one of the following:

c:\orant (Windows NT, prior to version 8i)
c:\orawin95> (Windows 95)
c:\oracle\ora81 (Beginning with release 8.1.5, the 8i release)
Oracle Home Directory
If you currently have access to Oracle8, take a moment now to be sure that you can find your Oracle Home directory.