This step by step installation guide will cover the installation of openSUSE 12.3 32-bit using the default Live KDE desktop image. Installing the 64-bit version will be the same as this guide. I will try to explain certain options and provide helpful hints along the way, so rather than just following the guide, you can understand the reasoning behind the decisions.
If there are any mistakes please draw my attention to them and I will correct as needed. I have tried to make this as simple as possible, whilst covering the vast majority of scenarios users will come across whilst installing this operating system.
The first thing you should do is head to the openSUSE website and download the openSUSE 12.3 KDE Desktop Live ISO image from the openSUSE download page, This guide uses openSUSE-12.3-KDE-Live-i686.iso.
Using your disc burning software, burn the .iso you downloaded to a DVD. Those that prefer to use USB media can use the official USB preparation guide on the openSUSE website to create a bootable USB device.
Before you go any further, ensure all important data is backed up in case of data loss on your drives. This guide assumes you have media backups of your hard drives and you are safe to proceed.
For those of you using Windows, and installing Linux for the first time I recommend you either use a separate hard disk that does not contain the Windows OS, or create a partition big enough for Linux within Windows using Disk Management in the Administrative Tools menu of the control panel. 20GB of hard disk space is absolutely plenty of space for you to begin exploring openSUSE whilst at the same time having room to grow.
Ensure you have a network cable connected, restart your computer, and boot from the DVD drive.
The installer will then load up and initialize the graphical environment and after a short while you will be presented with the following box:
Confirm the correct default language and the most appropriate keyboard for your location and click “next” to proceed.
Choose your location and time zone, then confirm the clock is correct for your locale. Click “next” to move to the next step.