Create tablespace
create tablespace rec_catalog
datafile ‘/data/oradata/CDBRCAT/rec_catalog.dbf’
size 10M autoextend on
extent management local uniform size 1M;

alter session set “_ORACLE_SCRIPT”=true;

Create user
create user rcat identified by randompassword
default tablespace rec_catalog
quota unlimited on rec_catalog;

Grant Privileges 
grant recovery_catalog_owner to rcat;
select privilege from dba_sys_privs where grantee = ‘RECOVERY_CATALOG_OWNER’;

PRIVILEGE
—————————————-
CREATE TABLE
ALTER SESSION
CREATE VIEW
CREATE TYPE
CREATE SYNONYM
CREATE CLUSTER
CREATE TRIGGER
CREATE SESSION
CREATE PROCEDURE
CREATE DATABASE LINK
CREATE SEQUENCE

connect to the Catalog

Create an entry in TNS names CDBRCAT

rman target / catalog rcat@CDBRCAT

Recovery Manager: Release 12.2.0.1.0 – Production on Fri Aug 10 10:19:12 2018

Copyright (c) 1982, 2017, Oracle and/or its affiliates. All rights reserved.

connected to target database: CDBRCAT (DBID=1512138245)
recovery catalog database Password:
connected to recovery catalog database

Create RMAN Catalog

RMAN> create catalog tablespace rec_catalog;
recovery catalog created

Register the current database
RMAN> register database;

database registered in recovery catalog
starting full resync of recovery catalog
full resync complete

 

Verify if Database is registered in RMAN Catalog

sqlplus rcat@CDBRCAT

SQL*Plus: Release 12.2.0.1.0 Production on Fri Aug 10 10:31:20 2018

Copyright (c) 1982, 2016, Oracle. All rights reserved.

Enter password:
Last Successful login time: Fri Aug 10 2018 10:26:06 -04:00

Connected to:
Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 – 64bit Production

SQL> select * from rc_database;

DB_KEY DBINC_KEY DBID NAME RESETLOGS_CHANGE# RESETLOGS
———- ———- ———- ——– —————– ———
FINAL_CHANGE#
————-
1 2 1512138245 CDBRCAT 6766569 20-JUN-18