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Closed 2 years ago.
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I can't believe no one ever did this, but I'm searching for days now and haven't found anything.
I have just bought a Raspberry Pi 4 and would like to use it as a wifi access point (for information, I will probably install Gentoo with hostapd in it).
I would like this access point to be in “passive” mode, only listening to new devices and not emitting beacon when there is no station connected to it. I looked at hostapd configuration file, but I could not find anything suitable.
I wonder if I can, by order of preference:
find a configuration option to manage this automatically;
be able to automatically capture connection/disconnection events and switch beacon on/off using a bit of shell scripting;
if nothing else is available, modify a driver or an application to add this no beacon idle mode.
Have someone ever heard of a way to do this?
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Closed 5 years ago.
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Is there any Linux command/Bash script for wireless clients to know the number of clients connected to each WiFi SSID ? How can I do this in bash ?
I am not sure what you want to achieve, so I will give you several answers to point in different directions.
To get all SSIDs (including all public information) you can use the following ...
$ su
# iwlist scan
I hope this is what you looking for.
If not, then you maybe want to know how many active connections one service is carring. This is by far more complicated. To check for active connections you will need a port sniffler like tcpdump and huge knowlegde.
A more common way would be to access the log files or the protocol of the server, but I think you had not asked if you have the rights to do so.
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Closed 7 years ago.
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I interrupted an install of Windows 2008 server on a fast machine that was taking too long with the intentional of using an alternative boot media to the USB flash drive I was using. (It kept showing me a message saying it was preparing my computer for first time use for nearly 2 hrs).
I therefore removed the USB drive and surprisingly it then came up with the message asking to either start in safe mode or a normal start.
I choose a normal start and it booted fine. Should I have confidence in using this as a production server or should I just go for a clean install ?
As a "production server"? You shouldn't even be asking, don't take any risks at all and redo it, it doesn't take that long.
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Closed 6 years ago.
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I was looking at how windows provides tools like this called Remote Desktop Connection. Then I wondered, how would of this been accomplished. First most likely a socket connection is made between the two computers, but then how is a usable session opened. How could I do this in Java or Python?
My goal is to make one of these for connections over the internet protocol.
Research the protocol RDP which underpins the remote desktop connection support. Libraries exist to assist in using RDP in many different programming languages when you get to that point.
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I am working on a fleet management system that track a fleet fo ambulance using tracking device "Teltonika FMXXXX".
The system should finally operate almost 1400 ambulance, recording their history (Position, speed, ...) and online tracking.
I need to do a stress test on the server. I need to ensure that the 1400 devices will operate probably and the server can handle them.
I need to know how to simulate 1400 devices that send there data packet through TCP protocol?
The only way to do this is to write a basic teltonika GSM-GPS module emulation program that connects to your server and send some fake location etc as many times as you want.
In order to do that you have to read your FM-xxxxx device protocol and see how teltonika's protocol works.
Usually those kind of device protocols are proprietary and you have to ask the ventor (teltonika) to provide you more info about the protocol, in order to implement the whole communication scenario.
you can take a look at this pdf Teltonika FM Protocol
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Closed 8 years ago.
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I have 3G internet stick, Tele2 Huawei MF190. Now, when I connect it with Ubuntu, Debian etc., it asks me for my PIN and I just choose my provider and everything works great.
Now, when I do the same thing on other Linux distributions (I think it was Arch, Gentoo) it's not working out-of-the-box. Now, what library I actually need to have for this to work?
Why? I'm going to try making my own distro (just-for-learning) from LinuxFromStratch project and I want to be sure to include this library for 3G Internet sticks.
Thank you all! :)
You need to setup usb-modeswitch.
Couple of general guides explaining how to configure it are available here and here.
Also this discussion explains the exact steps needed to get Huawei MF190 working on Linux with the help of usb-modeswitch.