Ingo
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Access point as WiFi router/repeater, optional with bridge
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46 votes

We are talking about an access point together with a wireless client connection on interface wlan0 to another wifi network (wlan repeater) or an internet router. If you want an access point together ...

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Setting up a Raspberry Pi as an access point - the easy way
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43 votes

━━━ Setting up an access point ━━━ We are talking about an access point together with an ethernet port eth0. If you want an access point together with a wlan0 client connection to another wifi network ...

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How to disable wifi in Raspberry Pi 4
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41 votes

Raspbian is managing hardware with overlays. In /boot/overlays/README you will find: Name: pi3-disable-wifi Info: Disable Pi3 onboard WiFi Load: dtoverlay=pi3-disable-wifi Params: <None> ...

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Use systemd-networkd for general networking
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32 votes

Tested on a Raspberry Pi 4B with Raspbian Buster Lite 2020-02-13 updated on 2020-05-05. For reference I use a fresh flashed SD Card with the tested version. Updates done with sudo apt update &&...

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Howto migrate from networking to systemd-networkd with dynamic failover
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29 votes

Tested on a Raspberry Pi 4B with Raspbian Buster Lite 2020-02-13 updated on 2020-04-11. Updates done with sudo apt update && sudo apt full-upgrade && sudo reboot. It will not work with ...

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Workaround for a wifi bridge on a Raspberry Pi with proxy arp
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28 votes

Proxy arp is a way to build a pseudo bridge that is working on OSI layer 3 but it behaves like a real layer 2 bridge. So it is a good way to workaround the lack of WDS support on Raspberry Pi. There ...

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Make "iw wlan0 set power_save off" permanent
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23 votes

Power save mode was an issue years ago on older versions of Raspbian. But it is fixed for a long time. Now it is disabled by default with the WiFi driver brcmfmac. You will find it if you grep the ...

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Running a script after an internet connection is established
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21 votes

As @Milliways commented here is where the power of systemd comes to play. There is no need to wait that sequential processed commands are finished. systemd is working parallel (that is what it makes a ...

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Why does my Pi always have the same IP address?
20 votes

In addition to the already given answers I will give some additional background information. In general the DHCP protocol is made to reduce dynamic changes as much as possible. It is an aspect of ...

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Can RPi4 run simultaneously on dual band (WiFi 2.4GHz / 5GHz)?
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18 votes

Beforehand the answer: Yes, it is possible to run a RPi 4B simultaneously on dual band (WiFi 2.4GHz / 5GHz), but only with predefined interface combinations given by the hardware. If one interface is ...

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Why am I getting a rainbow screen and flashing red PWR LED with a new Raspberry Pi 3B+?
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16 votes

I've made this answer to summarize the experience to this issue. We are talking about Raspberry Pi 3 Model B+, released on 2018-03-14. It has some new and updated features compared to Raspberry Pi 3 ...

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Raspberry Pi sudo apt-get update not working
15 votes

I assume you are using Raspbian. It could be that your installation lists are broken. I suggest to reinitialize them by editing sources.list and raspi.list. By default they look like this: rpi ~$ cat ...

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How can I use an init ramdisk (initramfs) on boot up Raspberry Pi?
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14 votes

I have found that there is a setup in rpi ~$ cat /etc/default/raspberrypi-kernel # Defaults for raspberrypi-kernel # Uncomment the following line to enable generation of # /boot/initrd.img-KVER ...

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How to correctly restart wpa_supplicant debug with networkd-systemd?
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14 votes

First to shine a light on this mish/mash of different commands. On Raspbian there are three concurrent network environments installed: old style debian networking with ifupdown is configured in etc/...

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What are the possible OUIs for the Ethernet MAC address?
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13 votes

To elaborate the answer from @cachius: the OUI has changed from B8-27-EB (hex) Raspberry Pi Foundation B827EB (base 16) Raspberry Pi Foundation Mitchell Wood ...

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How to start a python script at boot
13 votes

With the endless loop in the script it seems that it should run endless in the background as service. Running services nowadays is done with systemd using unit files. Just create a new service with: ...

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Raspberry Pi WiFi to Ethernet Bridge for a server?
13 votes

This is a common problem with tons of documentation on the web. A very informative discussion I've found on (1). Be aware that this problem only belongs to a wifi client connection that you want to ...

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Access point as WiFi router/repeater with additional WiFi-dongle
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12 votes

It is known that the Raspberry Pi can spawn an access point and connect as client to another wifi network simultaneously with its on board wifi chip. How to do that you can look at Access point as ...

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Is it possible to simultaneously use the dual band(2.4 Ghz and 5 Ghz) of Raspberry pi 3 B+ to create an AP?
12 votes

It is exactly determined what the Raspberry Pi 3B+ is able to do with its WiFi on-board device. With the command iw you can show what interface combinations are possible. Just execute $ sudo iw list | ...

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Why is hostapd masked after installation?
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12 votes

Just from the installation with sudo apt install hostapd there is nothing configured for the service. hostapd has no default setup so it doesn't make sense to start the service without it. To avoid ...

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Easy backups and snapshots of a running system with LVM
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11 votes

You can move the installation of the Raspberry Pi OS to a LVM volume. But what does it help me? You can take snapshots from your running system. You can install software and if you don't like it you ...

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How can I delay the startup of systemd services until the datetime is set (no RTC on the Raspberry Pi)
11 votes

UPDATE: Please note the answer from @jarondl. There is a new systemd-time-wait-sync service that we can use since Raspbian Buster. To syncronize with the time service there is a special time-sync....

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What is causing gaps in logs?
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11 votes

The time gap can be explained because the Raspberry Pi does not have a realtime clock built-in. Raspbian takes effort to make the gap as small as possible and don't always start with 1970-01-01. It ...

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Raspberry Pi Zero W as a WiFi repeater
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11 votes

This setup is DEPRECATED and no longer maintained! Look at Access point as WiFi repeater, optional with bridge for a more flexible setup. It is possible to use the wifi device on a Raspberry Pi as an ...

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How to setup an unprotected Ad Hoc (IBSS) Network and if possible with WPA encryption?
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10 votes

There are mainly three setups to have a peer to peer network: unprotected ad-hoc interface by configuring the WiFi device unprotected ad-hoc interface using wpa_supplicant (Recommended) Only with ...

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Run 64-bit Raspberry Pi OS beta test version
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10 votes

You can find the image of the 64 bit Raspberry Pi OS at https://downloads.raspberrypi.org/raspios_arm64/images/ You can download and flash it to a SD Card like any other image of the operating ...

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What is the correct way to connect serial console on RPi4 Model B?
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10 votes

First a complete picture with "official" colored wires. Thanks to fiery for providing this picture to connect an USB to TTL serial adapter. As shown in the pinout you have mixed up TXD (pin 8) and ...

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Accessing the system log on Raspbian
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10 votes

Raspbian comes with systemd. I prefer to use this progressive system. Systemd has a consistent journaling with journalctl with no need to know where log files are stored. But to answer your question ...

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Boot from USB, if no then SD card
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10 votes

A Raspberry Pi has a proprietary built-in boot manager and there is no way to modify it. It has a fixed boot order and will always boot from the SD Card if it is plugged in. It also depends on the ...

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Howto install UPnP/DLNA media renderer
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9 votes

Tested on a Raspberry Pi 4B with Raspbian Buster With Desktop 2020-02-13 updated on 2020-04-18. Raspbian Buster Lite 2020-02-13 updated on 2020-03-26. Updates done with sudo apt update && sudo ...

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