Cumulative Patching for Oracle-12.1.0.2.0

Hi Team,

I am new to oracle Database and we are having the below version running on RHEL-7. May I know how can I apply all cumulative patches available till date?

SQL> select banner from v$version;

BANNER

--------------------------------------------------------------------------------

Oracle Database 12c Enterprise Edition Release 12.1.0.2.0 - 64bit Production

PL/SQL Release 12.1.0.2.0 - Production

CORE    12.1.0.2.0      Production

TNS for Linux: Version 12.1.0.2.0 - Production

NLSRTL Version 12.1.0.2.0 - Production

Note - We are not going for an update to 12.2 for now.

Please let us know.

Thanks!