GNU/Linux Ubuntu 21.04 Installing Oracle 12c R2 DB – Quick Start Guide
You are Welcome! The Tutorial Shows You Step-by-Step and Visually How to Install Oracle 12c R2 Database in Ubuntu 21.04 Hirsute 64-bit GNU/Linux Desktop/Server.
And this Oracle 12c R2 Ubuntu 21.04 Installation Guide Includes All the Essentials Commands and Basic Screenshots Process.
The Process is Extended and Tricky so it require a little patience and confidence with the Command Line shell.
Especially relevant: Ubuntu-like Systems are Not in the List of Oracle 12c R2 Database Supported OS So you should Use It At Most for Development and Not for Production.
Now Relax and Take the Time of Reading, Understanding and Executing Carefully the Instructions Contained here.

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1. Downloading Oracle 12c R2 DB
Download the Oracle 12c R2 Database for Linux:
Oracle 12c R2 .zip for Linux
The Link Contains the List of Oracle 12c R2 Database Releases. -
2. Accessing Shell
Open a Shell Session or Terminal Emulator Window
Ctrl+Alt+t on desktop
(Press “Enter” to Execute Commands).Or Login into Server.
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3. Extracting Oracle 12c DB
Then Extract Oracle 12c Database into /tmp
Possibly Double-Click/Right-Click and Open with Archive Manager:
Or From Command Line:unzip -d /tmp linuxx64_122*.zip
Contents
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