Download and apply required patches for your software release after completing your initial installation.

• Downloading and Installing Release Update Patches
  Download and install Release Updates (RU) and Release Update Revisions (RUR) patches for your Oracle software after you complete installation.
• Setting External Jobs Ownership for HP-UX Installations
  On HP-UX platforms only, set external jobs ownership to a low-privilege user.
• Setting the Oracle User Environment Variables
  On each node, in the installation owner user profile file, set the environment variables ORACLE_BASE and ORACLE_HOME, and ORACLE_SID; also add ORACLE_HOME/bin to the path environment variable.
• Recompiling All Invalid Objects
  Oracle recommends that you run the utlrp.sql script after you install, patch, or upgrade a database, to identify and recompile invalid objects.
• Configuring Services on Oracle RAC and Oracle RAC One Node CDBs
  During installation, if you select a multitenant container database (CDB), and configure pluggable databases (PDBs), then you must add services to the PDBs after installation.
• Copying Oracle ASM Password File For Oracle RAC One Node Database
  After installing Oracle RAC One Node database, copy the Oracle ASM password file, if configured, to all candidate nodes configured for fail over, unless you use shared password files stored in Oracle ASM.