Questions tagged [raspbian]

A Linux distribution for the Raspberry Pi, derived from Debian

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21 views

apt not installing package, even though it exists on the source

I'm having a problem with some old packages installed on my machines. Some of those packages are very old and insecure. However, apt-get install doesn't recognize new versions, and even when ...
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29 views

python script not running from crontab

This is one of the so many questions asked in the forums. I've a script that runs perfectly if I run it from the linux terminal. However when I let it run from crontab at a reboot it doesn't work. I ...
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Why mesh network nodes do not connect to the internet?

I have 3 raspberry Pi 3 connected to a mesh network with batman-adv, a raspberry has a WIFI dongle and is the gateway to the internet. The gateway configuration is: A file named ~/start-batman-adv ...
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Bluetooth cannot be started

Using Raspbian Lite on my RaspberryPi 4. Haven't been able to get the Bluetooth working. I tried $ sudo systemctl start bluetooth but $ systemctl status bluetooth ● bluetooth.service - Bluetooth ...
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1answer
55 views

HDD disconnects after random intervals on raspberry pi 4

I have a 2.5" hard drive connected to my raspberry pi4 usb 3.0 port (it draws power from the raspberry pi). I have used my drive on windows machines before and had 0 problems. After connecting to the ...
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Very slow printing with Dymo Label-Printer on Raspbian and CUPS

I have a problem with label printing on a Raspberry Pi: When I start a print on a Dymo LabelWriter 450 Turbo with CUPS and drivers from matthiasbock/dymo-cups-drivers it takes about 6-7 seconds until ...
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8 views

Nginx: error 410 in private Network, while working from outside

I have set up Nginx together with DDClient, such that my own domain forwards everyone to my private network. My Nginx index.html is reachable from the outside, yet when i try to access it from within ...
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15 views

How to send data back and forth between 2 computers which are in different networks? I can use a third computer as host

I have 2 identical Raspberry pi's (A & B) with Raspbian buster on each. My idea is to communicate between the 2: sending output of a program (not even a KB/s) via ssh (or other program, I am open ...
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23 views

USB Support in Qemu User Mode Emulation

I have a CLI program compiled for x86_64 for which I have no source code (a firmware programming utility). I would like to run this on a Raspberry Pi. The program runs fine using Qemu user mode ...
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25 views

Unable to mount root file system as read-only at boot

I am running Raspbian Buster on a raspberry pi, and I have tried to make the filesystem read-only as I don't need to write data and I want to spare my sdcard. I have followed a guide that basically: ...
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1answer
34 views

Simultaneous WiFi connections

I've been trying to configure my PI to connect to two networks at the same time with inconsistent results. I am using both the built in adapter and a USB adapter. The USB adapter reports as a Edimax ...
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1answer
33 views

Is it normal to have two running wpa_supplicants?

I'm trying to debug issues with wifi connectivity of my RPi 3 (it just randomly loses connection sometimes). And I noticed that ps aux | grep wpa_supplicant gives me: root 310 0.0 0.4 10708 ...
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system-resolvd starts using local nameserver as DNS whenever network is not available

I have an IoT device that is connected to a node via a local wireless network. After doing the computations, the device tries to posts the data to the cloud. The device is connected to the internet ...
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22 views

How to communicate with plymouth (splash screen software) programmatically?

I'm not running X server or Wayland, I'm writing an OpenGL application and I want it to stop right after plymouth starts displaying shutdown splash screen... I tried simply stopping it on shutdown, ...
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1answer
33 views

Files Written to External USB Disk are taking up Internal Storage Space

Forgive me if I'm in the wrong Stack, this seemed like a more general Linux thing, so I posted here. Np if I need to take it elsewhere. Also I'm pretty new to Linux so please be patient. Hardware= ...
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1answer
20 views

How to use my Arch Linux machine to access my Raspberry Pi, which is on the local network?

I have Raspbian installed on my Raspberry Pi Zero, which is connected to my internet modem by Ethernet cable. My Arch Linux desktop computer also is connected to my modem via Ethernet cable. How do ...
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30 views

Changing permission to hard drive directory Raspbian

I would like to change permission to the directory where my USB drive is mounted that is /media/pi/Elements. I can only have access to SSH. Here is what I tried (as a root and pi user) : root@...
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1answer
25 views

Problem install scipy on Python 3

I am running Linux on Rasbpian and using Python 3.7.3. I have tried for days to install scipy but unsuccessful. I have tried pip, pip3, apt-get etc.. I have even tried uninstalling and re-installing ...
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Trying to redirect all traffic on a access point to an apache internal web server on a raspberry pi but keep geeting name resolution error

I have been using https://www.raspberrypi.org/documentation/configuration/wireless/access-point.md https://www.linux.com/tutorials/dns-spoofing-dnsmasq/ as guides. Basically I want is when someone ...
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30 views

Raspberry Pi Start python script during boot

I have a Raspberry Pi which has a I2C 16x2 display screen. The screen simply say Welcome. Problem: I would like for this script to run as soon as the Raspberry Pi is turns on with power. I added ...
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1answer
91 views

Trigger a script on WiFi connect-disconnect event in raspberry Pi

I am a newbie with Raspberry Pi. I am having one Pi3 and one Pi Zero. Pi3 is acting as a router and my PiZero is connected with it. I want to trigger a script on connect-disconnect event. I have ...
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1answer
43 views

Question on L3 'pseudo-bridge' implementation for Raspberry Pi 4B

We have implemented, on the Raspberry Pi 4B, a L3 "pseudo-bridge" using Proxy ARP (parprouted) under the static configuration guidance given by user Ingo found here to provide a local database to our ...
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22 views

nfs read write mount (root dir) not working (still says read-only system)

I have 2 raspberry's, one has a nfs-server and the second one mounts the root dir (/) from the nfs server. How can i mount the filesystem as read write ? I already use the rw attribute within the /etc/...
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1answer
26 views

libcups2-dev won't install because of libcupsimage2-dev

I'm running Raspbian and want to install Splix, for which I need libcupsimage2-dev, so I installed it using apt-get, which yielded an error saying it has a dependency on "libcupsimage2-dev" which won'...
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34 views

USB network adapter claims to work at 100 Mpbs, but router says it's 10 Mbps

I have a cheapo USB Ethernet adapter connected to Raspberry Pi Zero. When I log into my router's interface, I can see that the connection speed is 10 Mbps. However ethtool eth0 says that it's 100 Mbps ...
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1answer
64 views

$SHELL in tmux is different than $SHELL in the shell that I launched it from

Been wrestling with this for a few hours and it’s driving me crazy. When I SSH into my machine at home, my default shell is zsh. I can confirm this with echo $SHELL, which outputs /usr/bin/zsh When I ...
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1answer
52 views

Raspbian: Check the sound output

How can I check, from the command line, that the audio line output (of a virtual device created with ALSA plugins) has an audio signal? And check the strength of the signal?
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37 views

GPG error: “The following signatures were invalid” on Docker installation with cURL

I'm trying to install docker on my Raspberry Pi 4b (raspian 10 buster), but get this error on running the installation command as listed on the official website: ~ > sudo curl -sSL https://get....
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1answer
8 views

Touch screen not responding

I have a raspberry pi 4 with a 7 inch HDMI touch screen display. The display works fine but I can't find any docs for getting the touch screen to work.
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1answer
43 views

mdadm create raid 5 stopped after ony few hours

I'm trying to setup a raid 5 for my Nextcloud but when I run the mdadm --create command it stops. Here is my configuration : Disk /dev/sda: 2.7 TiB, 3000592982016 bytes, 732566646 sectors Units: ...
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1answer
132 views

Dnsmasq not working in port 53 but there's nothing else on port 53

So I'm running an apache2 server and hostapd on a raspberry pi 2, with raspbian. When I try to run dnsmasq with dnsmasq.conf localhost=127.0.0.1 (among others settings I don't think they are important ...
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46 views

How to encrypt external disk without backup/restore the existing data?

I have an external USB disk with ext4 unencrypted: /dev/sda1 3.6T 2.9T 613G 83% /data I wish to encrypt this disk without losing data. I migrated this disk from Raspberry3 to Raspberry4, ...
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1answer
49 views

How to install a compiled binary

I am still learning the basics of using Raspbian and having trouble while trying to install a program on Github with two options; source code or compiled binary. Having put the source code method ...
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2answers
61 views

Force the stdout, stderr logging with timestamp

I have a Raspberry-Pi based device that takes input from switches and sensors connected to its GPIO, as well as from Arduino connected via TTY serial. The main app managing all this is written in ...
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25 views

udev Rule Doesn't Trigger When USB Gamepad Connected

I have a Raspberry Pi 4 hooked up to my TV. When I plug in my USB controller, I would like to run a script that uses CEC to turn on my TV, switches the TV input to the Pi, then starts Steam Link. The ...
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1answer
32 views

How can an owner / ACL change with su / sudo be refused because of missing privileges?

I've got a file owned by root, which must get write access for normal users (particularly user pi): pi@autoradio:/import/valen/autoradio $ ls -al autoradio.db -rw-r--r-- 1 root root 2887050 Nov 12 ...
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1answer
182 views

Raspberry Pi 4 not booting up after reboot

I am having a brand new RPI4B and I am booting from a 128Gb SD card. My RPI is connected by a network cable directly to my WiFi router and I have configured static IP address in the dhcpd.conf file. ...
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97 views

SFTP server on raspberry pi with multiple users

I'm trying to make a NAS out of my raspberrypi and instead of using Open Media Vault, I want to see if I can do it with Raspbian since I want to also install nextcloud and installing nextcloud on open ...
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1answer
34 views

Raspberry PI only using 4 GB of 32 GB SD card

I'm currently using a Raspberry PI 4 to run FreePBX. I'm using raspbx to run it. So far everything was going good for a few days. Today I started getting a lot of problems receiving calls. I logged ...
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1answer
111 views

Raspberry Pi 4 becomes unresponsive after Chromium idle

I am building a kiosk application on my Raspberry Pi 4 (4GB RAM Version) that requires that Chromium continuously idles as a service. I created a supervisorctl service that will keep it alive and give ...
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53 views

Global .Xsession file

I am trying to run a Raspberry Pi in kiosk mode. Currently, I have an .Xsession file placed in /home/pi/ that opens the Chromium browser on system boot. Everything seems to work fine for now. Is it ...
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2answers
153 views

wpa_cli connection to hidden ssid

I have a raspberrypi ZeroW that I am trying to connect to a network with a hidden ssid. I know that I could add this line "scan_ssid=1" to my wpa_supplicant.conf file for setup that way, however I ...
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15 views

Linux - Raspberry Pi - Keep portable dvd drive awake/alive

I am trying to use my portable dvd drive with my raspberry pi and I have gotten the drive to activate using mount "sudo mount /dev/sr0 /media/cdrom_a" and copy some of the files off of it, but about ...
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9 views

Raspbian: Reading USB port intermittently works

I have a Raspberry Pi running Linux - Raspbian. The problem is that I'm seeing odd behavior when I try to read the USB port. It gives intermittent results. Last night it worked, this morning it ...
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1answer
78 views

Problems with apt in Raspbian where /var content has been removed or corrupt

Apparently on a production server there has been some problem and someone has deleted the contents of the /var folder. This has caused several errors that I have been solving with various services ...
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1answer
38 views

How do I run an interactive script on tty1 before user log on?

I have a Raspberry Pi running Raspbian Buster (headless) and want to have the system run a script at boot that presents an interactive menu to the user, using either bash dialog or curses / ncurses. ...
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66 views

Syslog-ng failing, unable to resolve 0.0.0.0

I am rebuilding my Raspberry Pi from scratch and following my docs that I keep with regards to what I install and configure, so that I can quickly get the system rebuilt. In this instance I am using ...
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1answer
391 views

Allow UFW rules in specific IP range

I need to setup some firewall rules but I do not want to open them to public since I am running an nginx server, how can I allow the follow rules only locally from IP address 192.168.178.0 to .64? ...
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1answer
58 views

How to display only extracted files with tar, not the ones which are not extracted /not overwritten?

I'm extracting a tar archive with tar -xf /tmp/update.tar -C / -v --keep-newer-files. The -v Option is to display all files processed, the --keep-newer-files Option is self explaining. Due to all ...
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1answer
255 views

Automatically verify passwords for classroom exercise? [duplicate]

I'm trying to write a bash script which, among several other things, will "log in" as a user (preferably with su if possible) without needing to interact with the password prompt, i.e., will ...

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