Hi Samuel.
> I am really newbie in linux using amateur radio. So I need first
> know what a tnc really is, what it do and where can I find one.
Let's split that question up:
1. What is it?
TNC stands for "Terminal Node Controller", but probably the best
way to think of it is as the packet radio version of a telephone
modem, but with some intelligence built in that just isn't there
in the telephone equivalent.
2. What does it do?
It packages the data leaving your computer's serial port into a
form suitable for transmission over the amateur radio bands using
the AX.25 protocol and transmits the result. It also performs the
reverse transformation on the data arriving from your radio.
3. Where can you get one?
I don't know the brazilian ham radio scene at all, so I can't name
any particular shops. However, a good place to start would be your
local ham radio emporium/shop/store/whatever.
Hope that helps...
Best wishes from Riley GM7GOD / KB8PPG.
+----------------------------------------------------------------------+
| There is something frustrating about the quality and speed of Linux |
| development, ie., the quality is too high and the speed is too high, |
| in other words, I can implement this XXXX feature, but I bet someone |
| else has already done so and is just about to release their patch. |
+----------------------------------------------------------------------+
* ftp://ftp.MemAlpha.cx/pub/rhw/Linux
* http://www.MemAlpha.cx/kernel.versions.html