Oracle recommends that you complete these tasks after installation.

• Creating a Backup of the root.sh Script
  Oracle recommends that you back up the root.sh script after you complete an installation.
• Setting Language and Locale Preferences for Client Connections
  Configure client applications connecting to an Oracle Database according to your locale preferences and your I/O device character set.
• Recompiling All PL/SQL Modules
  Run the utlrp.sql script after you install, patch, or upgrade a database, to identify and recompile invalid PL/SQL modules.
• Downloading and Installing the ORAchk Health Check Tool
  Download and install the ORAchk utility to perform proactive heath checks for the Oracle software stack.