Oracle Optimal Flexible Architecture (OFA) is a set of file naming and placement guidelines for Oracle software and databases, to be able to use OFA on a server a number of common directories must be created, most of the directories are created automatically when installing Oracle software but some of them must be manually created.
Perform following to create directories used by Oracle Flexible Architecture.
# su - # cd /opt # mkdir oracle # mkdir oraInventory # chown oracle:oinstall oracle # chown oracle:oinstall oraInventory