Tutorial7: Installing Linux / Live Linux / Virtualization

INSTALLING LINUX / LIVE LINUX / VIRTUALIZATION

Main Objectives of this Practice Tutorial

• Download and install the VirtualBox VM software application

• Download and run the Knoppix Live VirtualBox file in a virtual machine

• Open a terminal and connect to your Matrix account via the ssh utility

• Run several open-source applications in your graphical Knoppix Linux environment

• Understand the limitation of running Knoppix Live as opposed to a persistent Knoppix installation

Tutorial Reference Material

Course Notes		Concepts		YouTube Videos
Course Notes: PDF | PPTX		Installing Linux Linux Installation Choices Live Linux Definition Virtualization Definition	Knoppix Resources Knoppix Website Download Knoppix VirtualBox VM	Instructional Videos: Install Knoppix as a Virtual Machine

KEY CONCEPTS

Installing Linux

Having a Linux system on your home computer provides access to a large selection of open source software.

Installing your own version of Linux on your notebook or desktop computer also can make it easier to practice working
in the Linux environment and learn how to perform routine Linux OS administration tasks.

A Linux distribution (often abbreviated as distro) is an operating system made from a software collection that is based upon the Linux kernel and, often, a package management system. Linux users usually obtain their operating system by downloading one of the Linux distributions, which are available for a wide variety of systems ranging from embedded devices (for example, OpenWrt) and personal computers (for example, Linux Mint) to powerful supercomputers (for example, Rocks Cluster Distribution).

Reference: https://en.wikipedia.org/wiki/Linux_distribution

Steps in the Linux Installation Process:

• Select a Linux Distribution and download a Linux Distribution Install ISO file
  to your Computer (Note: Be aware of any required Hardware Requirements for the Linux OS prior to installation.)
• Burn an Linux Distribution CD/DVD, or USB, or use downloaded file when creating a virtual machine.
• Once booted, the installation process transfers the live image to a disk (or flash memory) and configures the system.
• For most distributions, the installation involves a guided graphical environment help assist with the Linux installation process.

Linux Installation Methods

Standalone Installation

• Linux is the only OS on the computer
• Any existing data on your hard disk will be erased

Dual-boot / Multi-boot Installation

• A boot menu allows the user to select the desired OS.
• This options provides a method to access your computer if one OS fails to boot-up.
• Most Linux distributions can access the Windows partition if your Windows OS cannot boot-up.
• This booting method is great for troubleshooting (for example: booting into other OS to confirm that you can connect to the Internet to rule-out hardware issues.
• It is recommended to back up important data before proceeding.
• It is recommended to install the Linux OS last, as other operating systems may not offer a multi-boot option.

Virtualized Installation

• Virtualization requires a compatible processor: not all processors support that feature.
• Most recent multi-core processors support virtualization.
• The virtualized OS is installed and run in a window under another OS.
• The installation can usually be accomplished from an ISO image.
• One or more virtual machines can be run at the same time.
• The guest OS shares hardware with the host OS and possibly other virtualized systems.
• Special software is used to manage the entire process, referred to as the hypervisor.
• The guest systems have network access through the host.
• The selection of virtualization software (which allows creation and running of virtual machines) depends mainly on the host OS, although some are cross-platform. Other considerations as to virtualization software may be features, support, price and/or personal preferences.

Popular VM software for Windows and MAC include:

• VMware
• Oracle Virtual Box
• KVM
• XEN

Live Linux CD

A live CD (also live DVD, live disc, or live operating system) is a complete bootable computer installation including operating system which runs directly from a CD-ROM or similar storage device into a computer's memory, rather than loading from a hard disk drive. A Live CD allows users to run an operating system for any purpose without installing it or making any changes to the computer's configuration. Live CDs can run on a computer without secondary storage, such as a hard disk drive, or with a corrupted hard disk drive or file system, allowing data recovery.

As CD and DVD drives have been steadily phased-out, live CDs have become less popular, being replaced by live USBs, which are equivalent systems written onto USB flash drives, which have the added benefit of having write-able storage. The functionality of a live CD is also available with a bootable live USB flash drive, or an external hard disk drive connected by USB.

Reference: https://en.wikipedia.org/wiki/Live_CD

The Knoppix Live CD is available to run on workstations at Seneca College via AppsAnywhere
or you can download and run it on your home computer as a Virtual Machine
(requires VirtualBox VM software installed on your computer).

INVESTIGATION 1: BOOTING KNOPPIX (LIVE LINUX) VIA VIRTUALBOX

In this section, you will first download and install the VirtualBox VM application on your home computer,
then you will then download and unzip the Knoppix Live Distribution VM file to your computer.

You will then launch the VirtualBox application by double-clicking the downloaded VirtualBox VM.
Once you launch the Knoppix Linux distribution, you will learn in INVESTIGATION 2 to perform
a few basic operations in the Knoppix Linux graphical Linux environment.

Perform the Following Steps:

Download page for VirtualBox VM application.

ATTENTION: If you receive an error message indicating that your computer is NOT
set to handle virtualization, you need to enable virtualization in your notebook’s BIOS.

1. Click the following link to access the Oracle Virtualbox application download website:
   https://www.virtualbox.org/wiki/Downloads https://www.virtualbox.org/wiki/Downloads]
   
   
2. In this website, click the link corresponding to your computer's operating system
   to download to your computer.
   
   
3. Install the downloaded Virtualbox VM application on your computer.
   
   NOTE: You may be required to allow authorization to run this program, select to install devices (if prompted) and to restart your computer after installation.
   
   
4. Click the following link to download the zipped (compressed) Knoppix Live Distribution
   file to your computer: Knoppix Virtualbox VM
   
   NOTE: This file is approximately 5GB in size and might take a while to download.
   
   
5. Open a File Manager application and navigate to directory that the Knoppix.zip file
   was downloaded (eg. Downloads).
   
   
   

   Knoppix VM file contained in the zipped file. Double-click Knoppix.vbox file to launch the Knoppix Live Linux Distribution.
6. Unzip the downloaded zip file (In MS Windows: Right click and Select "Extract All" )
   
   NOTE: The contents of this zipped file should appear in another file manager window.
   
   
7. Navigate to the folder containing the extracted zipped files and double-click the file called Knoppix.vbox to launch the Knoppix VM.
   
   NOTE: By double-clicking on this file (even if the VirtualBox application is not running)
   it will launch the VirtualBox application and start the Knoppix virtual machine.
   
   If you have difficulty running Knoppix on your home machine/laptop you may ask your
   Learning Centre ULG leaders for additional help in troubleshooting why Knoppix
   is not working on your home machine/laptop.
   
   

   Knoppix Start button (icon on the left).

8. If prompted, click Scale to proceed.
   
   
9. Allow time for the Knoppix Linux distribution to start. This is a graphical Linux distribution which will start-up in a desktop environment.
   
   NOTE: You are NOT prompted for a username and password because this is a Linux Live distribution and you have been assigned a generic account.
   
   
10. Click the Knoppix Start button (refer to left icon in diagram on right). In the Knoppix menu, select System Tools
    
    
    

    The Konsole application will display the Bash shell to issue Linux commands.
11. In the system tools menu, and select Konsole to launch a terminal application.
    
    FYI: To increase font size, press ctrl+ to reduce font size, press ctrl-.
    You can drag the Konsole terminal window from the bottom-right corner
    to increase the window size.
    
    
12. In the bash shell, issue the following Linux command: whoami
    
    What is the name of your generic Knoppix Linux Live account?
    On your Knoppix live OS, there is a generic user called "knoppix" that can
    be accessed without a password. This account has its own home directory.
    
    Let's test this out by using the ssh command to connect to your Matrix account.
    Your Knoppix virtual machine uses your host computer's operating system which
    is already connected to Seneca's Global Portal.
    
    
13. Issue the following Linux command to connect to your Matrix account:
    ssh yourSenecaId@matrix.senecacollege.ca
    
    
14. Enter yes to share your public key.
    
    
15. When prompted, enter your password (remember that password does not "echo-back").
    
    Were you able to connect to your Matrix account?
    
    
16. Confirm that you are in your home directory on your Matrix account.
    
    
17. Use a text editor (nano or vi) to create a file in your current directory called myvm.txt
    and enter the following text displayed below:
    
    This is line 1
    This is line 2
    This is line 3
    
    
18. Save editing changes and exit the text editor.
    
    
19. Confirm that you created this file and confirm that the contents of this file are correct.
    
    Let's run a shell script to check that you created the myvm.txt file (with correct file contents) in your home directory.
    
    
20. Enter the following command: bash /home/murray.saul/scripts/week7-check-1
    
    
21. If you encounter errors, make corrections and then re-run the checking script until you receive
    a congratulations message, and proceed to the next step.
    
    

In the next investigation, you will learn to work in a graphical Linux environment.
You will also run several open-source application within the Knoppix graphical environment.

INVESTIGATION 2: USING THE GRAPHICAL KNOPPIX VM

Let's learn to run open-source applications on your graphical Knoppix Linux Live distribution.
But first, let's download and run a shell script that will display dialog boxes in your graphical Knoppix VM.

Perform the Following Steps:

1. Make certain that you are running your Knoppix Linux Live virtual Machine
   (refer to step #7 in INVESTIGATION 1 if you need to start your Knoppix VM).
   
   Although you will be learning to create and run shell scripts (near the end of this course)
   in your Matrix server , those scripts will only run in a command-line environment.
   
   Since you are running a graphical Knoppix Linux distribution on your computer,
   you can run scripts graphically (including the use of dialog boxes for input, output, etc.).
   
   
   

   Graphical input dialog box.
2. Issue the following command to download a shell script called week7-demo-1 from the Internet:
   wget https://matrix.senecacollege.ca/~murray.saul/week7-demo-1
   
   
3. Issue the ls command to confirm that the file called week7-demo-1
   has been downloaded to your current directory.
   
   
4. Issue the following to run this shell script:
   bash week7-demo-1
   
   
5. In the dialog box, click to select a directory and click OK.
   
   What did you notice?
   
   
6. Issue the following Linux command: ls -l week7-demo-1
   
   Notice there are NO execute permissions. That is why we have to issue the bash command
   followed by shell script file pathname (as an argument) to run the shell script.
   
   Let's add execute permissions so we can run this command by name
   (i.e. without using the bash command).
   
   
   

   Graphical output dialog box.
7. Issue the following command to add execute permissions for everyone for the week7-demo-1 file:
   chmod +x week7-demo-1
   
   FYI: This method is a quick method of adding execute permissions for
   the owner, same group members and others.
   
   
8. Issue the ls -l command for this file to confirm execution permissions were properly added.
   
   
9. Issue the following: ./week7-demo-1
   
   Did the shell script run?
   
   NOTE: The shell script uses the zenity command to create dialog boxes. Although you may need to install this application in other Linux distributions, it is automatically included with the Knoppix distribution. We don't learn about the zenity command in this course, but here is a link to some simple examples using this command in case you are interested: How to Use Zenity
   
   
10. Issue the following command to terminate your Matrix session: exit
    
    
11. Issue the Linux command: exit to close the Konsole terminal window.
    
    
12. Use the Knoppix start menu and search the Internet submenu to launch the firefox web-browser.
    
    
13. In the web-browser, go to the Google website and perform a Net-search on Knoppix wiki.
    
    
14. When finishing browsing the Knoppix WIKI, close the Firefox web-browser.
    
    
    

    The LibreOffice application is the default word processor.
    
15. Use the Knoppix start menu to select Office and then select LibreOffice - Writer
    to launch a word processor application.
    
    
16. Create a small document and save changes to the file mydoc to your home directory,
    and exit the Libreoffice word processing document.
    
    
17. Use the Knoppix start menu to select logout, then select shutdown to terminate your Knoppix Linux Live session.
    
    
18. Press ENTER when it indicates to Remove your CD.
    
    NOTE: Although you are NOT using a physical CD, this step is required to shut-down
    your Knoppix session and close your VirtualBox application.
    
    
19. Repeat step #7 to launch a Knoppix Linux Live session.
    
    
20. Use the Knoppix start menu to launch a graphical file manager
    (Hint: Accessories -> File).
    
    
21. In the file manager, search for your word processing document file that you saved on your home directory.
    Does your word processing document still exist? If not, why?
    
    
22. Open the Knoppix start menu, select games and try running a few games
    (a few recommendations are: Frozen Bubble, Extreme Tux Racer and Open Arena).
    
    Now that you have had an opportunity to use your Knoppix Linux Live distribution,
    let's shutdown the VM and move onto the practice questions at the bottom of this tutorial.
    
    
23. Open the Knoppix start menu and select logout and shutdown to end your Knoppix Live session.
    
    

LINUX PRACTICE QUESTIONS

The purpose of this section is to obtain extra practice to help with quizzes, your midterm, and your final exam.

Here is a link to the MS Word Document of ALL of the questions displayed below but with extra room to answer on the document to simulate a quiz:

https://ict.senecacollege.ca/~murray.saul/uli101/uli101_week7_practice.docx

Your instructor may take-up these questions during class. It is up to the student to attend classes in order to obtain the answers to the following questions. Your instructor will NOT provide these answers in any other form (eg. e-mail, etc).

Review Questions:

1. Define the term Linux Distribution.
2. List and explain two advantages of installing a Linux distribution on your home computer or laptop.
3. List and explain two things to consider prior to installing a Linux distribution on your home computer.
4. Explain why installing Multi-boot for Linux is useful for computer troubleshooting.
5. Define the term Virtualization.
6. List the steps to start the Knoppix Linux distribution from your home computer.
7. List 4 applications that are contained in the Knoppix Linux Live distribution.
8. Explain the difference between a Live Linux distribution and an installed Linux distribution.