To enable a read-only Oracle home:

1. Perform a software-only Oracle Database installation.

2. Run the roohctl -enable script.

3. Run Oracle Database Configuration Assistant (Oracle DBCA) to create a database.

Software-Only Database Installation

1. Log in as the Oracle installation owner user account (oracle) that you want to own the software binaries.

2. Download the Oracle Database installation image files (db_home.zip) to a directory of your choice. For example, you can download the image files to the /tmp directory.

3. Create the Oracle home directory and extract the image files that you have downloaded in to this Oracle home directory. For example:

   $ mkdir -p /u01/app/oracle/product/19.0.0/dbhome_1
   $ chown oracle:oinstall /u01/app/oracle/product/19.0.0/dbhome_1
   $ cd /u01/app/oracle/product/19.0.0/dbhome_1
   $ unzip -q /tmp/db_home.zip

   Note:

   Ensure that the Oracle home directory path you create is in compliance with the Oracle Optimal Flexible Architecture recommendations. Also, unzip the installation image files only in this Oracle home directory that you created.

4. From the Oracle home directory, run the runInstaller command to start the Oracle Database installer.

5. In the Select Configuration Option screen, select Set Up Software Only.

6. Select your installation type. Installation screens vary depending on the installation option you select. Respond to the configuration prompts as needed.

Run the roohctl Script

1. Go to the bin directory

   $ cd /u01/app/oracle/product/19.0.0/dbhome_1/bin

2. Run the roohctl script to enable read-only Oracle home.

   $ ./roohctl -enable 

3. On Oracle Real Application Clusters (Oracle RAC) installations, run the preceding roohctl script on every node of the cluster. Alternatively, run the roohctl script with the nodelist option and provide the list of cluster nodes:

   $ ./roohctl –enable –nodelist comma_separated_list_of_nodes

Run Oracle Database Configuration Assistant

1. Ensure that you are still in the bin directory and run Oracle DBCA.

   $ ./dbca

2. In the Select Database Operation screen, select Create a Database.

3. The configuration screens vary depending on the options you select. Respond to the prompts as needed.