What is Oracle Base?

At the root of the Oracle directory structure is the directory called Oracle base, denoted by the environmental

variable ORACLE_BASE. The Oracle base directory is the top directory for all Oracle software
installations. As mentioned previously, Oracle recommends that you use the form /pm/h/u.
The default owner of the Oracle base directory is usually a user named oracle, and the standard
directory is usually named app. Therefore, the Oracle base directory usually has the form of /pm/app/
oracle (for example, /u01/app/oracle).

The Oracle installer will take this as the default Oracle base and install all the software under this
base directory. You can create the Oracle base directory by using the following commands (assuming
that u01 is your mount point and user oracle is the Oracle software owner):







# mkdir -p /u01/app/oracle
# chown -R oracle:oinstall /u01/app/oracle
# chmod -R 775 /u01/app/oracle