Run the Database Configuration Assistant:
[oracle@collabn1 ~]$ /u01/app/oracle/product/12.1.0/dbhome_1/bin/dbca
The splash screen appears.
Select Create Database and click Next.
Select Create a database with default configuration.
Global Database Name: RAC.racattack
Storage Type: Automatic Storage Management (ASM)
Database Files Location: +DATA
Fast Recovery Area: +FRA
Database Character Set: AL32UTF8 - Unicode UTF-8 Universal character set
Administrative password: racattack
Check Create As Container Database
Pluggable Database Name: PDB (*)
A warning is shown because the password is weak. Click Yes to continue.
The prerequisite checks may fail due to space requirements. It's safe to ignore by checking Ignore all.
Review the summary page and click Finish.
The database creation is finished. Click Exit, then Close.