Is there a way to set virtual desktops to 0 ?

I want to use the space for something else.

All desktops are virtual desktops, so the easiest way to set them to 0 is not to spawn an x-server and work in the virtual terminals.
If you want only 1 virtual desktop, that's dependent on your Window Manager/Desktop Environment, which one are you using?

I am using JWM, Joes Window Manager.

OK, so according to his documentation...

The system wide configuration file is located in /usr/local/etc/system.jwmrc.. I wouldn't modify that without first making a backup copy.
The user specific config file can be created by copying the system.jwmrc to the users home directory, ~/.jwmrc
It's an xml file, which should make this pretty easy, xml uses elements and attributes...
example
<Program icon="terminal.png" label="Terminal">xterm</Program>
Program is the element, the attributes are icon and label. The executable, xterm in this case, is the data the element refers to. <Program... > opens the element. The attributes are enclosed with these brackets and </Program> closes the Element.
More on xml here...
You're looking for the "Desktops" tag in the configuration file,

Desktops
The number of desktops is controlled by the Desktops tag. The width attribute determines how many desktops are available horizontally and the height attribute determines how many desktops are available vertically.


I'd go with 1 width and 1 height to start with. The documentation looks pretty straight forward, let me know if you have any problems.

Thanks.

There is only one file in /usr/local/etc/.

A text file that says:

I did a search for system.jwmrc with Pfind, but it did not find it.

Maybe a change was made in the newest version ?

I found the settings in jwmrc-personal.

Height and width were already set to 1.

I tried 0, but then it gave me 4 desktops.

Good learning experience.

Thanks Andy,

Kudos on tracking down the config file.
I may give it a try this weekend, I'm still wondering if 1,1 for the setting wouldn't give you a single desktop (think in terms of table creation, 1 row height, 1 column width). I'm also wondering if reducing the interface to a single desktop is going to reduce the resource consumption footprint of the window manager, or even the x server.