Programs To Access System Resources

4.8    INSTALLATION OF LINUX OPERATING SYSTEM (Ubuntu 16.04 LTS)
Step by step installation 0F Ubuntu 16.04 LTS
1.    Using a DVD?
It’s easy to install Ubuntu from a DVD. Here’s what you need to do: Put the Ubuntu DVD into the DVD-drive
Restart your computer. You should see a welcome screen prompting you to choose your language and giving you the option to install Ubuntu or try it from the DVD. If you don’t get this menu, some computers are set as default to boot from hard drive. This should be as simple as entering the BIOS, enable booting from CD-ROM drive and making sure the CD-ROM is before the hard drive in the boot order.
The most common way to enter the BIOS is to press DEL key when the PC is first booted (this seems to be becoming standard). On other systems, it could be a different key but what you need to do is just to follow the instruction that appears on the screen when it first boot.
The best way to find out the details of that is to look in the users’ manual or search the manufacturer’s website.
When a pc require you to hold down or press a key to boot from CD, some PCs require you to hold or press key to enable booting from the CD drive, the best place to find out this information is at the user’s manual of the PC or the manufacturer website.
Here are some common key to try in some PC.
•    Apple PCs: Hold down the C-key while rebooting.
•    Toshiba, IBM and others: Press choose CD-ROM.
F12 while booting to get to the menu and
•    ASUS and others: press TAB key while booting and select CD-ROM from boot menu.

Description on Try Ubuntu
The Ubuntu DVD and USB stick function not only as installation media but also allow you to test Ubuntu without making any permanent changes to your computer by running the entire operating system from the DVD or USB stick.
Your computer reads information from a DVD at a much slower speed than it can read information off of a hard drive. Running Ubuntu from the live DVD also occupies a large portion of your computer’s memory, which would usually be available for applications to access when Ubuntu is running from your hard drive. The Live DVD/USB experience will therefore feel slightly slower than it does when Ubuntu is actually installed on your computer.
Running Ubuntu from the DVD/USB is a great way to test things out and allows you to try the default applications, browse the Internet, and get a general feel for the operating system. It’s also useful for checking that your computer hardware works properly in Ubuntu and that there are no major compatibility issues.
To try out Ubuntu using the live DVD/USB stick, insert the Ubuntu DVD into your DVD drive, or connect the USB drive and restart your computer. After your computer finds the live DVD/USB stick, and a quick loading screen, you will be presented with the “Welcome” screen. Using your mouse, select your language from the list on the left, then click the button labeled Try Ubuntu. Ubuntu will then start-up, running directly from the Live DVD/USB drive.
DESCRIPTION ON INSTALL UBUNTU
At least 5GB of free space on your hard drive is required in order to install Clicking on the underlined “release notes” link will open a web page containing any important information regarding the current version of Ubuntu. 
Ubuntu. We recommend 15GB or more. This will ensure that you will have plenty of room to install extra applications later on, as well as store your own documents, music, and photos. To get started, place the Ubuntu DVD in your DVD drive and restart your computer. Your computer should load Ubuntu from the DVD. When you first start from the DVD, you will be presented with a screen asking you whether you want to first try out Ubuntu or install it. Select the language you want to view the installer in and click on the Install Ubuntu button. This will start the installation process. If you have an Internet connection, the installer will ask you if you would like to “Download updates while installing.” We recommend you do so. The second option, “Install this third-party software,” includes the Fluendo mp3 codec, and software required for some wireless hardware. If you are not connected to the Internet, the installer will help you set up a wireless connection. The “Preparing to install Ubuntu” screen will also let you know if you have enough disk space and if you are connected to a power source (in case you are installing Ubuntu on a laptop running on battery). Once you have selected your choices, click Continue.