Downloading FreeDOS as a Guest OS 113
Internet and download FreeDOS. Minimize the VirtualBox application for
now and open a web browser. Go to
http://virtualbox.wordpress.com/images
When your browser has brought up the site, it should look similar to
the figure below. You will see a list of virtual operating systems, with the
sponsoring web site for each one in parentheses.
Towards the bottom of the page, you will find the FreeDOS entry. The
reader is encouraged to go to the web site of each operating system and
check it out before downloading a file. Click on the FreeDOS
entry to start
the download process. When you click on any of the operating system links,
you will be taken to that system’s download page. There, you are given the
choice of which architecture (i.e., 32-bit or 64-bit) you want to install.
What is important for almost every operating system displayed on this page
is that you must
write down the passwords for the root user and default user
.
An example similar to what you will see is shown below:
FreeDOS
There are several FreeDOS images available.
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114 Cloud Computing
FreeDOS 1.0
Size
(compressed/uncompressed): 82.3 MBytes / 394 MBytes
Link
: http://downloads.sourceforge.net/virtualboximage/freedos
Of course, FreeDOS is the exception to the rule above, since it does not
require a root or user password. Click the link to download the image and
save it to a location you will remember—later in this practicum, you will
need to unzip this file and extract the images. We recommend that you
choose to save the files on a drive with plenty of space available.
4.6 Downloading the 7-Zip Archive Tool
Next, you will need to download an open source product called 7-zip (it
works on both Linux and Windows platforms), which can be accessed from
http://www.7-zip.org/download.html
Once the download is complete, perform the following steps
in
sequence:
1. Pick a drive with plenty of spare room on it and create a folder
named
VirtualGuests.
2. Download the
7-zip file
to the VirtualGuests folder and install it
using the standard options.
3. Once you have installed 7-zip, find the FreeDOS file you down-
loaded previously.
4. Highlight the file and right-click on it—choose the
7-zip extrac-
tion
option to extract files.
5. Extract the files to your VirtualGuests folder.
6. Your VirtualGuests folder will now contain two folders,
Machines
and
VDI.
The virtualBox image for FreeDOS will be
in the VDI folder.
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Adding a Guest OS to Sun xVM VirtualBox 115
4.7 Adding a Guest OS to Sun xVM VirtualBox
Now you will add the FreeDOS guest operating system to your virtualBox
host. Start by clicking on the
New
button.
The
New Virtual Machine Wiz-
ard
dialog box will appear:
The wizard is an easy-to-follow guided setup for installation of your
guest operating system. Click
Next >
to continue and you will be presented
with the
Virtual Machine Name and OS Type
dialog box:
Type
FreeDOS
in the
Name
field. Select
Other
for the
Operating Sys-
tem,
and for the
Version
we will choose
DOS.
Click
Next >
to continue on
to the dialog for memory configuration. In this part of the wizard, you have
the option of increasing or decreasing the amount of memory that will be
Chap4.fm Page 115 Friday, May 22, 2009 11:25 AM
116 Cloud Computing
used for the guest operating system. For those of us old enough to remem-
ber DOS, 32 MB of memory is plenty.
Just accept the default settings for now (you can always change them
later) and click
Next >
to proceed to the next section of the wizard, the
Vir-
tual Hard Disk
dialog box:
This dialog box allows you to select the virtual device image file (.vdi
file) that was previously downloaded and saved to the VirtualGuests folder
you created. What you see displayed in the dialog box is the name of the last
image added. In this case, it was an image of Damn Small Linux (dsl). If no
images have been installed on the host, the default selection will be similar
to the one shown below:
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Adding a Guest OS to Sun xVM VirtualBox 117
If you had previously created any virtual hard disks which have not
been attached to other virtual machines, you could select from among those
using the drop-down list in the Wizard window. Since we have downloaded
and extracted a new image of FreeDos, it won’t be in the list. Click the
Existing...
button to continue on to the
Virtual Media Manager.
In the
figure below, FreeDOS is listed as an available selection. If it is not listed,
then you need to add it by clicking on the
Add
button at the top of the dia-
log box.
VirtualBox’s Virtual Media Manager keeps an internal registry of all
available hard disk, CD/DVD-ROM, and floppy disk images. This registry
can be viewed and changed in the Virtual Disk Manager, which you can
access from the
File
menu in the VirtualBox main window. The
Disk
Image
Manager
shows you all images that are registered with VirtualBox,
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