Realtek 8187B wireless card

I am not aware of a free driver for this, nor does RealTek offer one. RT seem to offer a number of Linux drivers, but they are erratically supported (and I'd bet incredibly buggy - typical of proprietary Linux drivers).

Although some would consider this heresy (and there was a big flamewar on the kernel list recently about stack sizes etc related to this), you can try 'ndiswrapper'. The version included with Debian should suffice:

apt-cache search ndiswrapper

Google can help you find some web pages on hints for installing etc on Debian.

According to the ndiswrapper website:
http://ndiswrapper.sourceforge.net/joomla/index.php?/component/option,com_openwiki/Itemid,33/id,list_o-z/

Search the page for references to '8187B', there are several so you can try out a few things.

Just to be sure we're talking about the same thing - 8187B is a USB gizmo?

Now if you wanted a wireless gizmo, do you want USB, PCMCIA, or that weird thingy that looks similar to PCMCIA but isn't (the Macs and many new generic x86 laptops have them). In any case, the ultimate reference for wireless gizmos on Linux is:

http://linux-wless.passys.nl/

Read things very carefully - there are many classifications and the revision numbers of gadgets is extremely important. Some manufacturers like to make a Gizmotronic2000rev.A which works fine but Gizmotronic2000rev.B has an entirely different chip and doesn't work.

What you want is a gizmo that works very well with native drivers; don't waste time with ndiswrapper if you can help it - that's simply importing defective code from WinDos and poisoning your computer.

A lot of WIFI card don't have Linux drivers, I use satellite too, I worry about Realtek WIFI card, but under test with commview for wifi, it seem fine, but no driver under linux, linux-friendly wireless cards, with updated Ralink chipsets, you can try Ralink RT2561 and RT2571 chipsets, edimax Wireless PCI card or PCMCIA card should be good choices for toshiba laptop.