Here are some of the examples showing various PDB Administration activities...
In 12c, for the database creation, you have the option to choose either a non-container database (non-CDB --> pre12c architecture) or a Container database (CDB --> 12c multitenancy architecture). You can easily migrate a non-CDB database into a CDB database. However, You will not be able to migrate a CDB database back to the old architecture, non-CDB database.
By default, database will be created in pre12c mode. "Enable Pluggable Database" clause needs to be used inorder to make it as a CDB.
This note is about cloning and configuring an existing Oracle Home to a new location either on the same server or a different server. Cloning is much quicker especially when you are required to setup multiple database installations.
In this example, an existing Oracle Home on the server, 'kirlinc' is cloned to another server, 'kirlinb' with a different Oracle Home directory.
kirlinc: /data/oracle/app/oracle/product/12.1.0 --> kirlinb:/data/oracle/app/oracle/product/12R1