During the Prescribed Installation Process of Linux Ubuntu v.11.10 64-Bit of BitDefender Anti-Virus Through Terminal, I Am Having Issues Early On In The Install Process?

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Hello. I have a question to ask you. I am using Linux Ubuntu v.11.10 64-bit operating system.

I have a MagBook that I have used for some time now as a explicit and well developed guide to Linux Ubuntu latest distribution version v.11.04 (Okay, stand corrected – 'near' latest version now (v.11.10 is latest).) You can read the MagBook as a good non-fiction novel. :- )  Source: “Linux – The Complete Manual”, Jim Martin, Ed., Dennis Publishing Ltd., London, England, 2011.

Okay... ...it addresses in a section “Anti-Virus Software” how to install a highly recommended software security program most of us have heard of BitDefender Anti-Virus package for Linux Ubuntu. I have used BitDefender personally a few years ago on Windows 7 and I have had very good success with it. Regardless your personal thoughts and opinions and getting side tracked, I am in need of your help as I am having serious issues installing the security program.

After successfully requesting a free personal use license directly from BitDefender via my e-mail, I go to the URL: http://tinyurl.com/dymsjb . Because I am using a 64-bit machine, I select the option: BitDefender-Antivirus-Scanner-7.6-4.linux-gcc4x.amd64.deb.run (The first one.) and save the file.

Once downloaded, I run Terminal. Now, the installation process of BitDefender Anti-Virus requires me to use the command line through Terminal. I am told to enter the command:
cd /Desktop

Now, this is where the problem arises. When I enter the cd /Desktop in Terminal, it states:

bash: cd: /Desktop: No such file or directory

Obviously, an issue here.

Questions:

Can you tell me what is going on here? What does that mean and how can I correct this? Honestly, I am not sure in Unix/Linux/Debian/Ubuntu language, what this command is supposed to do?

To assist in your response since I may leave you aloof at this point without any follow through on what is to happen next; so let me share by quoting what proceeds next from the text:

“Now enter the following (noting the capital B of a 'Bit'), but instead of clicking Return, press the tab key. This will fill in the long filename for the downloaded BitDefender package:

sudo sh Bit

Hit Return and you'll be asked for your password. Enter it and the BitDefender license agreement appears.” ...I will stop here at this point since I believe you now have enough supporting information now.

(If I have more issues at a later stage in this process; I will post a new question thread at such time if necessary.)
 
So, what is the reason and and answer/solution to why I am receiving from Terminal:

bash: cd: /Desktop: No such file or directory            ¿???

Please reply.

Thank you!
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When you open terminal, it should already be in your /Home/[username] subdirectory, which is usually indicated by a '~' prompt (to the left of the dollar sign prompt).

Possibly they left the tilde out of the command in the instructions. Run
$ cd ~/Desktop
instead and see if that doesn't get you there.
Otherwise, if you just drop the / from the command and run
$ cd Desktop
it should also get you to the ~/Desktop subdir (if you're starting out in your /Home/[username] subdir), too.
If you hit Tab as the last part instructs, but it doesn't auto-complete the command for you, just paste in the whole BitDefender-Antivirus-Scanner-7.6-4.linux-gcc4x.amd64.deb.run filename in place of "Bit" and pickup again with 'Hit Return' in the next paragraph.

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Commented:
@ Darr247:

Hello. It is nice to see you.

Thank you for your comments.

I have found that the MagBook has made the typographical error I would have to presume. You are correct in that your second choice answer in your first comment [$ cd Desktop] is the correct text line command for Terminal. Thank you!!!

Therefore, I am not closing this thread. I do appreciate your second comment for further instruction. I did just that as you have instructed. I have successfully installed BitDefender Scanner program into my Linux Ubuntu operating system.

I have awarded your first comment 400 points and the Accepted Solution. Your second comment is awarded 100 indirectly applicable to the solution, yet extraneous points and the title of Assisted Solution.

Again, thank you!
Thanks for the feedback.
Still, I guess I don't understand why BitDefender is taking packages and putting them into .run files.
And I'm not familiar with MagBook... intuitively I would have went with

$ sudo sh BitDefender-Antivirus-Scanner-7.6-4.linux-gcc4x.amd64.deb.run --extract /temp

then

$ sudo dpkg -i /temp/BitDefender-Antivirus-Scanner-7.6-4.linux-gcc4x.amd64.deb

to employ the Debian package manager directly.

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