DB INSTANCE CREATION/ MEMORY MODIFICATION SCRIPT:
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1)  Login as ROOT user.

2)  At the command prompt, run the following
      $ cd /home/oracle/scripts/dbca/
      $ sh create_modify_instance.sh

3) Script will prompt for DB_NAME like :
    Please enter the database Name:
    (Suggestion: When creating a new db instance, use six-character name
    with NO special characters, blank spaces and upper case letters)
    cmsdev01       <-- for example

4) script will prompt for DB_SIZE like :
   Enter the memory size (Suggestion: 400M for DEV/ 8G for PROD):
      400M     (for 400MB memory allocation) or
      1.5G     (for 1.5GB memory allocation)

5) Watch for the completion of the script, it will display the status of the script execution at the prompt and also in the log file log_create_inst.log.
