create additional oracle 11g database in linux I have already created a database XE on my linux desktop.Please find the below information about the database.


  ORACLE_SID=XE
  
  ORACLE_BASE=/u01/app/oracle
  
  ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe


I have to create another database,eg: database name is DB1. My question is how i can set ORACLE_HOME for DB1 and other parameters in pfile ?

Also i can avoid the error

ORA-45301: XE Edition single instance violation error
Oracle Database XE Installation and Execution Restrictions


  Only one installation of Oracle Database XE can be performed on a
  single computer. This does not affect any existing installation or new
  installations of Oracle Database 11g Standard Edition, Oracle Database
  11g Standard Edition One, or Oracle Database 11g Enterprise Edition.
  In addition, users can run only one instance of the Oracle Database XE
  database on each individual computer. To run more than one Oracle
  Database server instance or install more than one copy of the database
  software, upgrade to Oracle Database 11g Standard Edition, Oracle
  Database 11g Standard Edition One, or Oracle Database 11g Enterprise
  Edition.