Learn about read-only Oracle home concepts like Oracle base home, Oracle base config, and orabasetab.

• About Read-Only Oracle Homes
  With Oracle Database 23ai, an Oracle home is available in read/write mode by default. However, you can choose to configure an Oracle home in read-only mode after you have performed a software-only Oracle Database installation.
• About Oracle Base Home
  Both, in a read-only ORACLE_HOME and read/write ORACLE_HOME, the user-specific files, instance-specific files, and log files reside in a location known as the ORACLE_BASE_HOME.
• About Oracle Base Config
  Both, in a read-only ORACLE_HOME and read/write ORACLE_HOME, the configuration files reside in a location known as ORACLE_BASE_CONFIG.
• About orabasetab
  The orabasetab file is used to define fundamental directories based on $ORACLE_HOME, ORACLE_BASE, ORACLE_BASE_HOME and ORACLE_BASE_CONFIG.
• Location of Networking Files in a Read-Only Oracle Home
  Learn about the search order and location of networking files like sqlnet.ora, tnsnames.ora, or listener.ora in a read-only Oracle home.