DBCA Silent Mode Installation

dbca -silent -createDatabase -templateName New_Database.dbt
   -gdbName PROD123 -sid PROD123 -SysPassword sys8tem2 -SystemPassword sys8tem2  
      -emConfiguration LOCAL -dbsnmpPassword sys8tem2 -sysmanPassword sys8tem2
         -characterSet UTF8 -nationalCharacterSet AL16UTF16 -memoryPercentage 40
            -continueOnNonFatalErrors true


----Before that, goto

$cd $ORACLE_HOME/assistants/dbca/templates

Edit the datafile locations, and select the required oracle components also,

$vi New_Database.dbt