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I need oracle tools to diagnose and troubleshoot.  This is the easiest, and least intrusive method I’ve found:

  1. Download and extract the "u01" folder from the Oracle XE RPM installation to /.
  2. Update your *.ora files here: /u01/app/oracle/product/11.2.0/xe/network/admin/
  3. Export environment variables: export ORACLE_HOME=/u01/app/oracle/product/11.2.0/xe export ORACLE_BASE=/u01/app/oracle export LD_LIBRARY_PATH=$ORACLE_HOME/lib:$LD_LIBRARY_PATH export PATH=$ORACLE_HOME/bin:$PATH
  4. Test it out. Seems to work just fine without having to install the full XE.