HT1428 chown -R does not work in terminal what do I do to change home name?

I want to give away or sell my mac but my home directory name is one I use on my other accounts.  I have deleted hard drive but my name is still in the guts of the computer HT1428 on how to change the account name did not work for me.  I must be doing something wrong in Terminal.  I have even tried sudo rm-r/home// but nothing happens. I have tried chmod but I can't understand the protocol for the commands.  I don't want to learn Unix, I just want to do this one thing.

Do this:
Prepare Your Mac for Sale
Boot from the OS X Installer Disc One that came with the computer.  After the installer loads select your language and click on the Continue button.  When the menu bar appears select Disk Utility from the Utilities menu.  After DU loads select the startup volume from the left side list then click on the Erase tab.  Set the format type to Mac OS Extended (Journaled) then click on the Options button.  Select the one pass Zero Data option and click on the OK button.  Then click on the Erase button.
Note: You can skip the Zero Data option if you are not concerned about removing sensitive personal data from the hard drive.  If you choose to skip this part of the process then it is possible for others to recover data from the hard drive.  The Zero Data procedure will prevent others from getting access to your personal information.
This process will take 30 minutes to several hours depending upon the size of the hard drive.  After formatting has completed quit DU and return to the installer.  Now complete the OS X installation.  At the completion of the installation do not restart the computer.  Instead just shut it off.  The next user will be presented with the Setup Assistant when they turn on the computer just as it would if new out of the box.
Be sure to include the installer discs for the OS X version you install per the above.

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