The software manager says that vBox is installed. I checked the entire list of available applications and it is not there. It also isn't where the Ubuntu wiki on vBox said it would be. Z/Z

Did you tried?
and
Regards

Can you run it from the commandline?
Show it is installed? If not, does
Show a bunch of files related to virtualbox?

Virtualbox needs a kernel module to be built, which in some distro's has to be done independently of the installation.
Should show 3 modules as being loaded..

@ukiuki: The command <$dpkg -l | grep -i vbox> gives the response of <-l: command not found> removing the dollar sign at the front of the command gives no response

@fukawi1: The command <$ which virtualbox> gives the response of <$: command not found> removing the dollar sign at the front of the command gives no response

The command <# updatedb && locate *virtualbox*> does not provoke a response on the command line

The command <lsmod | grep vbox> does nothing and putting the dollar sign at the front gives the same <$: command not found> message.

I am trying to set up a vbox in an Ubuntu-based variant that is so sugared up I no longer have teeth... not authorize a nuclear strike. No idea why I am going to the command line to run an application that the system says is already installed. This is a very common task attempted by just about anybody that uses Linux to access windows without having to reboot their computer. I also do not know instictively if commands need to be elevated to sudo or root. Z/Z

Ok, it is common to use $ and # symbols to indicate running a command as a user, and as root (sudo) respectively. As these are usually the terminating symbols of the prompt you see at the command line.
So in short, if it says "$ somecommand" you run can run it as a user. If it says "# somecommand" you would need to run it as root, or sudo, but you dont include the $ or # in the command itself.

It looks as though virtualbox isn't installed.

Unfortunately, i dont know anything about the GUI based package manager, so I can only help with the command line. If you would rather wait for assistance with the GUI, ignore me :P

Should install it.

Can you post a link to the guide you have been following?

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I wasn't trying to snub anybody. Some guy posted one of those "Let me google that for you" responses to a question I obviously could not find with the aid of the cult of Google... so I was a little on edge, people really should look into the origin of the word sabotage more often ( Star Trek VI: The Undiscovered Country... just because its sci-fi doesn't mean it can't be educational )

The guide I was following is at https://help.ubuntu.com/community/VirtualBox/FirstVM .

I'll try apt-get and see how it goes. I'll post the results in a few minutes. Z/Z

Reading package lists... Done
Building dependency tree
Reading state information... Done
virtualbox-ose is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 6 not upgraded. Z/Z

Ok, so its installed.
I don't know ubuntu well, especially the new unity interface. Does it have the ability to search the menu's? Try searching for "virtual" it is possible it has put the menu short cut somewhere other than the default.

https://help.ubuntu.com/community/VirtualBox
The above link suggests the menu entry could be under Applications > System Tools > VirtualBox. Although this conflicts with the documentation in the guide you provided, it could differ between ubuntu releases.

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Try to open main menu or alacarte to add to menu

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The executable name is VirtualBox

For Linux, command/filename/directories are case-sensitive, and Oracle decided to use capitals...

The package does not add a menu item to the GNOME/KDE menu that I've ever seen. Anyway, open a terminal and type "VirtualBox" (without the quotes) when the command line window appears. You should get the typical VirtualBox application window.

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Not the case with my Debian Squeeze install. But a valid point none the less.

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Interesting. On my Ubuntu server 10.04, the command is VirtualBox. I've typed it many, many times.

I should also say that I'm not 100% sure that I got the package from the repos or directly from Oracle. So that could also explain the naming discrepancy and lack of a menu entry.

EDIT:
Just checked my sources.list. My machine pulls from:
I think that package source was given as part of Oracle's instructions on their website. It's been a long time since I messed with setting it up.

Hopefully, this doesn't cause confusion.

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In debian with gnome2 there was an icon & was listed in menu under "Other"
Another place to check is the filemanager under /usr/share/applications double-click on icon it'll open.

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Yeah, there should be a menu item for the OSE version. Now that I'm thinking about it again, I installed the OSE version in the past, but later replaced it with the non-OSE version.

Anyways, I'll zip my lip and be quiet! Carry on

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So is typing "virtualbox" or "VirtualBox" into the command line going to work? I have already checked every item listed in the gnome interface and they are listed alphabetically so I am fairly certain it is not listed... lots of healing potions, tents and masamunes but no virtualbox. Z/Z