Questions tagged [linux]

Linux is a high-profile computer operating system. The Raspberry Pi can run one of a number of Linux distributions, the most pupular being Raspbian (Debian-based) and Arch Linux.

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315 views

Change FIFO pipe buffer size in Debian?

I'm on the latest Raspbian Jessie. I'd like to increase the size of an open FIFO pipe buffer. I've already upped the max size via sudo sysctl fs.pipe-max-size=4194304 Then I'm attempting the ...
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1answer
3k views

Scan Distance from Eddystone Beacons

I would like to read an Eddystone Beacon using my Raspberry Pi 3 to calculate distance from the beacon. I can't find any resources to do this from the official Eddystone documentation. How should I go ...
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3answers
3k views

Cannot access folder on Raspberry Pi

I'm trying to open a PHP file on my Raspberry Pi running Raspbian. But it won't let me move the file from its current location to the 'www' folder I keep getting an error message saying 'Access Denied'...
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1answer
707 views

Connect Pi3 to Windows/Linux via wifi direct?

I'm building something that needs to connect to a Pi3 wirelessly but there won't always be a wifi network for them to talk over. So I was hoping to use wifi direct to get them to talk directly. So ...
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719 views

Can't get udev rule working on the Raspberry Pi 3

I'm trying to separate some keyboards so they're not read by Qt on a Raspberry Pi. I'm using a udev rule to do so, but it doesn't seem to be working. I'm trying to direct /dev/input/event3 into /dev/...
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1answer
748 views

Latency for Raspberry Pi installed on USB drive

I recently bought a Raspberry Pi 3 model B (the last release of the Raspberry foundation), and after reading a lot of articles on the Web for SD card vs USB performances, I decided to move all the ...
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2answers
2k views

tightvncserver not setting up properly during installation using apt-get [duplicate]

I am trying to use tightvncserver on my Raspberry Pi 3 so that I can access the GUI without a monitor and keyboard. However, the install isn't updating-alternatives to vncserver in /usr/bin/ ...
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1answer
151 views

Shell Script won't kill PID when run by shairport-sync

I am currently running shairport-sync on a raspberry pi zero running raspbian lite. Everything works well, but I am choosing to use a soundcard for auxillary input as well. I currently have these ...
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1answer
212 views

Rpi not catching all GPIO Inputs

I'm currently using a RPI2 b running linux to check for when a pulse is received from an arduino (3.3v). Something to note is that I'm also reading data from uart and writing it to a file at the same ...
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1answer
51 views

Can't login to my Raspberry Pi anymore

I installed this package on my Raspberry Pi: sudo apt-get install libssh2-1-dev libssh2-php And when I rebooted and was going to login with Winscp I got the error message: Disconnected: No ...
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1answer
224 views

vnc4server. Daemon working. autostart not working

I have a Parrot OS Linux installed on my raspberry pi 3. I installed a VNC server using vnc4server and after some fight with ~/.vnc/xstartup file is working fine with my xfce4 Desktop Environment: ...
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1answer
110 views

Cannot install PureAdmin on my Raspberry Pi

I try to build my own FTP server. I already installed pure-ftpd and created a user for the FTP connection. It works well, but now I would like to have virtual users, for which I need install PureAdmin ...
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3answers
776 views

rpi 3 : combine wifi and ethernet networks

What I need: local Router --> RPI 3 <-- wifi Router local Router provides dynamic IP by Ethernet cable, but this is a local network, closed from global network. wifi Router (smartphone, or any ...
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1answer
263 views

WI-FI adapter doesn't work on minibian (RPi1B). What to do?

WiFi-adapter Ralink RT2571MF plugged in Raspberry Pi 1 B. OS Minibian. In minibian working as root. I followed instruction: $ apt-get update $ apt-get install firmware-ralink wpasupplicant iw crda ...
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1answer
76 views

cannot ping link-local address from other subnet when defaut gateway route is seted

i have a problem with my route table i dont know why it doesnt work. I have two test cases, i did draw a network map for each case. currently i cant resolv the goal. testcase-1 network map ...
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1answer
125 views

Run a python script when start up and SSH not log in

I am new to programming and doing a simple academic project with Raspberry Pi, I have a script which will monitor the changes of database and output the change with 2 different color LED. I want it ...
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1answer
159 views

Exclude kernel modules from plain Buildroot 2016.05 image

Buildroot is a great tool for creating a custom embedded linux system. If one builds a plain system without any changes from the default configuration using the current 2016.05 version one ends up ...
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1answer
106 views

Issue with owncloud and apache

I installed apache and No-IP DUC on my Raspberry Pi. Then, I could reach my simple html web page over the internet or on local network(using static IP of raspberry PI). Then I installed owncloud and ...
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1answer
2k views

FS80H USB Fingerprint Scanner in Pi 3

I have a Futronic (model FS80H) USB fingerprint scanner. I am currently trying to get it to work with a Raspberry Pi. On their website they mention that on Linux it doesn't use any kernel mode ...
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0answers
333 views

Compile JInput on ARM

I have a Raspberry Pi 2, and an arduino pro micro set up as a Joystick. On the Pi i have a java application that runs well on a PC with both Linux and Windows with the arduino joystick connected. But ...
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0answers
3k views

Streaming USB Webcam to YouTube Live - Raspberry Pi

all new here. Hoping someone can help. I am trying to Stream a USB webcam to YouTube Live Events but having difficulty. I followed: https://stackoverflow.com/questions/32947639/how-to-stream-on-...
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0answers
88 views

How to detect wlan network is out of range

Is there any suggestion how to detect the wlan network is out of range ? I've successfully made my device to connect access points and connected other access points also. I'm using the /etc/network/...
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0answers
45 views

What does following msg/error mean: GDBus.Error.org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject [duplicate]

The Title says it all. We just got a Raspberry 2 with a Debian Linux on it. After hitting 'Startx' the windows come up and we get this message: GDBus.Error.org.freedesktop.PolicyKit1.Error.Failed: ...
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0answers
46 views

Raspberry Pi boot script saves file to root /

We are doing a prototype of one device, where our central controller is running on RPi. Since we want it to automatically execute one application straight out of the box, without plugging anything in ...
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0answers
394 views

i am unable to boot with my latest rpi-3.18.0 kernel and enabling the device tree?

I am working on the latest rpi kernel ie 3.18.0 and by enabling the device tree. I compiled the source code and with that image and modules i am unable to boot. I downloaded the source code from ...
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1answer
702 views

PJSIP cross compilation linker error unresolvable relocation

I'm trying to write a very small, very simple project using PJSIP. But I'm already stuck on the first step, incorporating PJSIP in my project. I'm trying to build and compile on a Ubuntu 14.04 system ...
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1answer
107 views

Is raspberry Pi Stable enough

I want to implement a SMS server which will be receiving the SMS messages sent from my devices all around the country. May be about 5 SMS per minute. I want to know if the RBP would be stable enough ...
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0answers
569 views

WiPi not going into monitor mode

Ok so on my raspberry pi using the WiPi I am trying to set it to monitor mode using. Sudo ifconfig wlan0 down Sudo iwconfig wlan0 mode monitor But it says SET failed on device wlan0; Device or ...
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1answer
3k views

Openssl + Raspberry Pi

if I code a program with openssl on a Ubuntu laptop will it work when it is compiled on the Raspberry Pi or are the libraries are different? does the command sudo apt-get install openssl work on ...
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1answer
275 views

fixing gateway on dhcp connection raspberry raspbian

I am using a dhcp connection which gives me everything but a gateway. I am able to do sudo route add default gw 10.7.0.1 eth0 and get internet connection, so ping to www.google.es works just fine. ...
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2answers
529 views

Space of filesystem on SD card used for a Raspberry Pi

Today when I tried to start my Raspberry Pi I found one warning saying not enough room in the file system. Then I used df to see the storage, it showed: Filesystem 1K-blocks used available use% ...
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1answer
112 views

How to export a Linux instance from VirtualBox to a plain text filesystem?

For example, Raspberry Pi images can be "burned" to an SD card from an image file that contains a simple plain-text file tree that is the Raspbian (a Debian sub-flavor) filesystem (e.g., as discussed ...
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1answer
183 views

How to fallback to DHCP when STATIC fails?

I have a linux computer with a pre-configured static ip. When the pc is installed i need to access it via remote access teamviewer. Sometimes the static ip not working. Then i would like to switch to ...
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2answers
1k views

Tkinter on linux start up

I put a python Tkinter (GUI library) program on startup (/etc/profile) for my Raspberry Pi Linux and the program just has a label. Now i restart my raspberry pi and it's on my screen without any close ...
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1answer
48 views

Linux within the confines of a Pi-based system [closed]

Earlier today I was browsing software internships on my schools job posting website (I'm a CS student) and I noticed one of the jobs had this requirement: Experience with Linux programming, ideally ...
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1answer
161 views

AF_BUS on Raspbian

Dear RPI SO Community :), I want to try the AF_BUS Patch but I don't get what I need exactly for it. AF_BUS optimizes the performance of D-Bus in latency and throughput and I am working on a ...
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1answer
17 views

How to set the SESSION_MANAGER environment variable?

I'm designing a GUI app using wxWidgets. My requirement is to open an image from within the app. For that I'm calling wxTheMimeTypesManager->GetFileTypeFromExtension(wxT("png")). Unfortunately, ...
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1answer
606 views

Run Alpine on Raspberry PI 3 Model B+

I try to run my spare Raspberry PI 3 Model B+ with the most recent version of Alpine Linux (3.9.0). After I plugged everything in, HDMI, keyboard, LAN, SD Card and power, I don't get any reaction. ...
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1answer
69 views

1 Gigabyte Image with GUI and Firefox

I'm looking for a super small image for my Pi < 1 gigabyte. I need it to fit within the memory of the Pi. I only have 4 requirements: long term availability, a Gui, Firefox, and ethernet drivers. ...
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1answer
395 views

How could I use Wit.ai to get speech to text on my webpage running python script

I want the speech to be recorded by raspberry, send it to wit.ai and then get the response on my page(wich is actually the .py script and according to which I could run my conditions). Actually its ...
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1answer
92 views

How Raspberry Pi booting up? [duplicate]

I want to know, how Raspberry Pi booting up. Of course, I can google it, but I can`t found this information in official documentation [ https://www.raspberrypi.org/documentation ]. I am searching for ...
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1answer
179 views

Proxy Setup Unsuccessful

I have done proxy setup (both /etc/environment and /etc/apt/apt.conf) still cannot connect to internet neither through WIFI nor Ethernet. Please help its urgent.
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1answer
554 views

Transferring 16gb microSD to 64gb

I made a backup of the 16gb microSD card (installed with NOOBS) for a Raspberry Pi 3 and saved it to my Mac using: sudo dd if=/dev/disk2 of=~/Desktop/raspberrypi.dmg Then, I took a 64gb microSD card,...
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1answer
232 views

Touchscreen Keyboard for the Mentally/Physically Challenged

Hi this is my first time posting but i wanted to ask a question. First of all i'll outline my situation. Im currently working on a project to make a portable computer system for people who are ...
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1answer
624 views

How can i fix startx on my RPI3?

The day before yesterday I opened too many tabs in the browser, and hung my RPI. I turned it on again with the power turned on. But he was involved not as usual. Instead of having to download the ...
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1answer
2k views

connect UHF RFID reader with raspberry pi 3 using rasberian [closed]

i have a UHF RFID i am using raspberian os . i connected the tx rx and gnd to raspberry pi . but i dont know how to read a tag. and there is no sdk available for linux platform . can anyone guide me ...
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1answer
132 views

How to set up the Raspberry Pi [closed]

I have just gotten my Raspberry Pi. I am a beginner in Linux. Can someone please explain how I should go about starting up my computer?
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1answer
416 views

Rpi Zero W - What reasons to wifi not to load after power outage

I have 2 Rpis : Zero, Zero W. Both are running Strech Lite, in console mode, and serve a role in GPIO control in Home automation ( running pigpiod ). Last night, both was shut down due to power ...
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1answer
1k views

unity game in raspberry pi

i create a game in unity Unity 5.4.1f1 using windows ,i build the game for the Linux devices with x86 bit and 64bit but when i launch the app in raspberry he can't now the type of file and tell me to ...
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1answer
15 views

For the Chrony refclock directive, how is the precision option used?

The man page says the precision of the reference clock has units of seconds. What do those seconds measure?