This article will gives some advices for making a RMAN backup in the right way based on my experience.

This article will present a custom shell script to install oracle software : grid infrastructure and rdbms 11g/12c.

This is a korn shell script I created for educational purpose, you are free to use and change it at your convenience.

(ora_install_software.sh.zip file attachement in this article)

If you encounter TNS-12518: TNS:listener could not hand off client connection error, this article may help you.

This article will show how to create a Oracle 12c container database (CDB), with one pluggable database (PDB), in command line with dbca and silent option.

DBCA is for DataBase Configuration Assistant, this is a tool to create/delete Oracle databases.
It can be used as GUI or as command line.

This article shows how to manually create a Oracle database, known aswell as Oracle Instance, in command line with sqlplus.
For the laziest, there is a custom shell script for download which does all the creation database steps.

Another way to create database is to use dbca as explain here.

(ora_create_sid.sh zip file is attached in this article)