Ingo
  • Member for 3 years, 11 months
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Can't detect a raspberry pi scanning my local network
5 votes

You already reduced the setup to a minimum to locate the error. That's what I would suggest. But there is still your network environment involved. You can try to use a wired direct device to device ...

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Wireguard installation
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5 votes

I do not follow the link you have given, tl;dr. But it seems that it uses the method to download WireGuard from the Raspbian testing version Bullseye and install it on the current Raspbian stable ...

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rc.local shell script to run socket program
5 votes

One comment or idea to the subject is: don't use /etc/rc.local anymore! Debian/Raspbian/Raspberry Pi OS uses systemd instead of deprecated SysV since years as init system to start and manage services. ...

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Why does Raspberry Pi 4 do not support USB boot?
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5 votes

When will Pi4 officially support this feature? Since 2020-06-15 Is the beta bootloader safe to use? The beta bootloader is promoted to be stable (see link above). So it should be safe to use. How ...

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Schedule power off with systemd
5 votes

First of all: you are running Raspbian Stretch but tagged the question with pi-4. This is not possible. A Raspberry Pi 4B can only run Raspbian Buster. Your timer Unit looks good and should do. But ...

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How to make Raspberry Pi a Tor router with all kind of network setup using systemd-networkd
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5 votes

Tested on a Raspberry Pi 4B with Raspbian Buster Lite 2020-02-13 updated on 2020-05-19. Updates done with sudo apt update && sudo apt full-upgrade && sudo reboot. The setup of a Tor ...

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WiFi packet sniffer for RPi in c++
5 votes

Sniffing other WiFi networks you are not associated must be supported by the WiFi chip, called monitor mode. If you look at the chip configuration on the RasPi with: rpi ~$ iw list Wiphy phy0 --- ...

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Disable 5Ghz Wifi-band on Raspberry Pi 3B+
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5 votes

It is easy to select the frequencies you want to use. wpa_supplicant knows an option freq_list. Just add this line to your /etc/wpa_supplicant/wpa_supplicant.conf: freq_list=2412 2417 2422 2427 2432 ...

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Raspberry pi 4 b 5Ghz wifi access point problem
5 votes

I suppose you are using Raspbian. With my RasPis I have found that they tend to connect first to the 2.4 GHz band if both bands available. So first you should check if the 5 GHz band is seen by your ...

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Performance differences running Raspbian from USB flash drive versus SD card
5 votes

You are using a Raspberry Pi 3B+. This model supports booting from an USB storage device instead of a SD Card out of the box. Just flash the USB flash drive as you do with a SD Card, put it into an ...

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Raspberry pi access point: To use bridge or not?
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5 votes

You do not need to setup a bridge but it depends on what you want. In general there are two possibilities to connect to your internet router (or any other network gateway). You can use routing or ...

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Two dhcpcd services: systemd and init.d
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5 votes

Most popular distribution have changed its init system from old SysV to systemd including Debian and its flavor Raspbian. Scripts in /etc/init.d/ are leftover from SysV and they are all emulated by ...

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How can i install OpenCV on Raspberry Pi 4 (Raspbian Buster)?
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5 votes

You should use OpenCV from the default Raspbian Repository. It is tested and fits best into the Raspbian distribution without errors (I hope :). On Buster you will find with: rpi ~$ apt list python*...

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Count network traffic amount
5 votes

To get a statistic about your interfaces you just can use: rpi ~$ ip -statistics link It will show something like: 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode ...

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how to install protobuf in raspberrypi3 b+ stretch?
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5 votes

I suggest to install protobuf in raspberrypi 3 b+ from the default repository. With: rpi ~$ apt list *protobuf* you will find some packages supporting protocol buffers. Just install what you want, ...

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How to connect a ethernet device(having its own static I.p and netmask) wirelessly by my laptop?
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5 votes

It is a bit unclear how do you want to connect the Laptop to the Raspberry Pi. I will assume that there is no other wifi router as access point running for example to connect to the internet so you ...

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Would incorrect time/date data prevent SSH into the pi?
5 votes

I have never heard that ssh depends on date and time. I have just tested it by setting: rpi ~$ sudo date --set='2000-01-01' Sat 1 Jan 00:00:00 GMT 2000 rpi ~$ I have no problem to ssh into the ...

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Cannot resolve local hostname of my Raspberry Pi
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5 votes

To understand what's going on here is to know something about link-local addresses and how avahi handles it. If there is a mostly small home network without a DHCP server then avahi configures a link-...

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Multiple /etc/rc.local?
5 votes

You are running Raspbian Stretch and use /etc/rc.local. I don't have followed your attempts to find the error in detail but it seems you presume old style sequential behavior of rc.local for SysV init ...

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Bridge wlan0 <--> wlan1
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5 votes

In addition to the answer from @Milliways you have to enable 4addr support on the wlan interfaces with sudo iw dev wlanX set 4addr on. But if you try to add such an interface to the bridge you will ...

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How to avoid fsck at boot timing out
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5 votes

If you do not want to take the risk of corrupting your SD Card by disabling fsck on startup you can use your first suggestion: "lengthening the timeout" on starting services. With systemd you can ...

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How to set a different static IP on many Pis simultaneously
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5 votes

Haven't read the discussion on the chat complete (to much for scanning) but I suppose you create a master image and copy it over to your RasPis. you say: Ideally I want to be able to make changes ...

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How to stop XRDP service from autostarting
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5 votes

To disable a service means do not start it automatically on startup. It does not mean to disable its functionality. You always can start and stop it and it can be started by other services. That seems ...

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Internet traffic rules between wlan0 and eth0
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5 votes

Because you have different subnets it is possible to setup clean routing. I assume the following network setup for example: 10.10.10.1 10.10.10.2 192.168.1.13 192.168.1.1 +------...

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Using the Raspberry Pi as a Router
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5 votes

You are building a router with firewall. It does not make sense to give two default routes. The default route is the route ip addresses are send to that do not belong to local networks. If the router ...

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Issue with multi-user NAS setup
5 votes

This seems to be a classical unix rights problem. Let's have a look on it. To avoid confusion I set user of /media/NAS to root and then check where is the problem: pi@raspberry ~$ sudo chown root /...

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How to UNDO unwanted changes on my raspberry pi 4. Bash_profile not found
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4 votes

As already mentioned by others you have to use a colon instead of a space to concatenate paths: PATH=$PATH:/usr/local/opt/python-3.9.0/bin or PATH=/usr/local/opt/python-3.9.0/bin:$PATH The problem ...

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Startup processes errors
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4 votes

Don't worry about these "error" messages. They are shown on all installations. 1) Direct firmware load for ... failed with error -2: is an attempt of the kernel to load the firmware before ...

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Console login when password contains British Pound Sterling (£) character
4 votes

To have a decent answer, here is it what the questioner posted in a comment: I've resolved the problem by mounting the SD card on another computer, mounting the root filesystem, and deleting the ...

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How do I connect my new Raspberry Pi 4 Model B to my Laptop?
4 votes

To connect to the Graphical User Interface of the Raspberry Pi you have to use VNC. There is a detailed instruction from the foundation how to use it. Have a look at VNC (Virtual Network Computing).

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