The new password file location enables you to mount one shared read-only Oracle Home on different systems, making deployment for complex architectures more reliable and simpler. In other words, a read-only Oracle Home separates the software from the database configuration information and log files, which enables you to share the software across different deployments easily. A read-only Oracle Home also simplifies version control and standardization.
Use the following steps to enable the read-only Oracle Home:
Go to the bin directory:
$ cd $ORACLE_HOME/bin
Run the script to enable read-only Oracle home:
$ ./roohctl -enable