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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455 views

Raspberry Pi batman-adv ad-hoc network setup unreliability

Problem: I am trying to configure batman-adv network on raspberry pi 3b+ following this, using on-board wlan0 interface coming with raspberry pi 3b+. Once the network is executed by following all ...
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1answer
92 views

Configure pi so it doesn't show boot info - splash screen only

I'd like to configure my pi 2 so that I dont see any booting info. I'd like to have a splash screen (or video if thats even possible) and boot into a C++ game I wrote.
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272 views

Ubuntu, Firefox can access internet, but terminal can't

I'm connected to university router, and I know they have many restrictions, but firefox is accessing the repo links without any issue, but the terminal can't. How can I make the terminal use the same ...
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1answer
418 views

How do i create a raspbian sdcard with existing rootfs and boot folders?

I have a copy of rootfs and boot folders of a raspbian installation sent to me in via dropbox. How do i take a new sdcard and create from it a bootable raspbian? Also: the folders are in an archive ...
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1answer
556 views

Direct connection to Pi with usb-to-ethernet adapter possible?

I've got a pi 3B to which I always ssh over my home network. I'm now going to be traveling for some time and I want to mess around on the go. I read that you can connect directly to the pi using a ...
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1answer
39 views

Access Point connection problems/questions

So, I have a RaspberryPi3 b+ with Raspbian 4.14.78 and a Ubuntu 16.04 laptop. Now I want to use the laptop as a server and the RaspB as a client and have them communicate wirelessly. But I would ...
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1answer
254 views

Connecting a 1TB USB 2.0 WD Elements drive

I've just purchased a Raspberry Pi 3 and I've installed OpenELEC onto the Pi so I can run the Kodi. After this step - after this first step - I've succesfully set it all up and I've managed to get ...
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1answer
305 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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1answer
3k views

Wifi Not Working with Ubuntu MATE 16.04 and Pi 3b+

I was able to get Ubuntu MATE to finally run on my Pi 3B+ after following this tutorial: https://www.youtube.com/watch?v=tdJrd75_068&lc=z234tvgocvmqyzb5a04t1aokgml1ll00iwv1gbnt2da0rk0h00410....
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1answer
833 views

How can I debug why SFTP is not working while SSH is working?

I have an arcade run on raspberry pi 3 flashed with RetroPie 4.4. I already enabled SSH capability via raspi-config menu Test I can SSH into my Pi perfectly fine, but I can not SFTP into it. ...
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1answer
2k views

How do I prevent Pi prompt for username and password ? [duplicate]

I have an arcade run on raspberry pi 3 flashed with RetroPie 4.4. Just now, I'm not sure what had happened to my Pi hardware, network, or even SD card when I boot, I kept getting prompt to enter the ...
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1answer
97 views

Develop RPi framebuffer program on Linux laptop

Is there any emulator or some other way to develop a program for my 320x480 Adafruit PiTFT screen (available as /dev/fb1) on my Linux Mint laptop? The program currently gets images from Pi Camera, ...
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1answer
60 views

Parallel compilation linux real time kernel

Within the framework of a lab I had to compile a kernel using several commands such as: make zImage j-8 make modules j-8 make dtbs j-8 j-8 means I used parallel compilation but I am asked this ...
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1answer
186 views

Login to Raspberry Pi Via Python Script

I am trying to make a system to login to the Raspberry Pi with an RFID tag. I successfully connected the RFID reader RC522 module to the Raspberry Pi and I can retrieve the number of the tag and write ...
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1answer
704 views

Why won't my systemd execute?

I get this error message when I try to run systemd: Failed to create /user.slice/user-1000.slice/session-c2.scope/init.scope control group: Permission denied Failed to allocate manager object: ...
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1answer
351 views

SSH on Raspberypi hang or frozen

I have direct connection with Raspberry pi via ethernet cable on linux machine. if i run ssh pi@10.42.0.22 i could establish secure connection. the problem i encountered is raspberry hang or frozen ...
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1answer
445 views

How to ssh without needing a password [duplicate]

I just want to run a python file on raspberry pi and use terminal code ssh. So, I don't want type password to do that. What should I do?
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2answers
2k views

Failed to create symbolic link?

I'm trying to symlink file /etc/systemd/network/00-default.link to /boot/00-default.link. This allows me to force a change to my MAC address from the boot directory, which is the only directory ...
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1answer
1k views

A USB modem not working on Raspberry Pi 3 Model B+

I have been trying set up USB modem on my pi (Raspberry Pi 3 Model B+) but have not been successful. The modem in itself is recognized - lsusb shows the entry for the device - but I cant't get it ...
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2answers
94 views

Can't see home folder in drive but can see from terminal

I'm trying to open my home folder on my raspbian lite sd card. I have the rasbian os plugged into a sd card reader to my ubuntu laptop. I can't see it in when I open the directory in GUI but I can ...
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1answer
41 views

Show me how to a start a background process and then be able to kill it at later time [closed]

Can someone please show me an example of starting a simple background process on the command line; and then later maybe have to open a new command line and then kill the background process?
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1answer
76 views

Trouble with changing owner group of a windows shared folder from root to pi

I have mounted a windows shared folder to a raspberry pi directory using sudo mount.cifs ip_address_windows_machine/folderpath /home/pi/shared_folder -o user=MY_USERNAME,password=MY_PASSWORD The ...
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2answers
79 views

In Raspberry Light how do I conditionally disable the wlan interface when the eth interface is connected?

We are using Screenly and a Raspberry Pi 3 Model B for digital signage. I see from the documentation that this is running on Raspberry Light version of Linux. Due to the web interface for Screenly, we ...
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0answers
614 views

Why doesn't extract-vmlinux work with Raspbian's /boot/kernel*.img?

To monitor if a reboot is necessary, I wanted to compare the version of /boot/kernel*img against the version of the running kernel. To get the kernel version of a compressed linux kernel image (...
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1answer
211 views

Recovery of SRM save game file from Retropie corrupt SD card

I've been googling at this all night and have found multiple conflicting methods of recovering/formatting/saving corrupt SD cards but i'm a complete n00b with both Raspberry Pi and Linux. Basically ...
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1answer
77 views

cant open image from rc.local

I would like to open image from rc.local. I am sure rc.local is getting called during boot as it execute/run test c++ code. I tried with various image viewer like gpicview , mirage. I can try with ...
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0answers
57 views

My Pi seems to be duplicating my USB stick in the file manager

I formatted my USB stick and called it STORE-1 But after some time, File Manager showed me this: Before it was SETTINGS and STORE-1. Now access is denied to STORE-11 and STORE-1 and I can only use ...
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1answer
360 views

Missing cpu.cfs_period_us cgroup subsystem in Raspbian Stretch on Raspberry Pi Zero

I'm dabbling about with cgroups on my Raspberry Pi Zero using the latest version of Raspbian Stretch and I was surprised to see only the following cpu cgroup subsystems available: cgroup....
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1answer
341 views

Can I run Raspberry Pi .img file on android device?

I have a Raspberry Pi 3 and the lastest Raspbian is installed. Now, I run an armhf Debian on my android smart phone with Linux Deploy. Any suggestions How I could run Raspbian on my android smart ...
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2answers
39 views

Cannot execute copy of an original file

For testing and learning purposes I have made a copy of raspi-config file. i can see it in directory and can open it for editing. However, after saving it with different name I cannot execute it ...
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1answer
516 views

Cross Compiling ARM Kernel on 64bit machine

I've been trying to cross compile a kernel for my Pi 1 on my 64bit Desktop, following this guide: https://www.raspberrypi.org/documentation/linux/kernel/building.md At this command (in the last ...
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2answers
38 views

Raspberry Pi - Remote / Attached Access - Plug and Play

OK I wont go into the reasoning apart from the fact that I need to find or research and create an EASY Plug and Play solution to enable Raspberry Pis to be used in a classroom environment. Criteria ...
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1answer
522 views

Installing Linux on Raspberry pi 3 b+

I am currently going through tutorials explaining how to install linux kernel on the raspberry pi, most of the tutorial (an example) recommend the use of an SD card and to install the kernel on it. so ...
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3answers
87 views

Apache permissions on local network [closed]

I'm playing around with some automation for my home and have setup Apache and MySQL on my Pi along with a basic web page to control some pins on the Pi. I am wanting to set permissions on the whole /...
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0answers
150 views

PPS ioctl failure in GPS

I am using U-Blox AG GPS in my Raspberry pi 3. My GPS had a fix and displayed all the data in a right way. After an hour of working, it is not getting a fix. So I checked the gpsd status. It displayed ...
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1answer
1k views

Reading Multiple bytes in Raspberry Pi over I2C using Wiring Pi library [closed]

0 down vote favorite I am trying to build one sensor interface using Raspberry Pi over I2C. I have installed WiringPi. I am seeing limitations of wiringPi library, that supports only 1 or 2 bytes I2C ...
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3answers
948 views

GPS on Raspberry Pi 3

I am using Raspberry Pi 3 with U-blox AG USB GPS. I am not getting a fix in it. To check the data coming out of GPS I used the following command: sudo cat /dev/ttyACM0 It did not show any data. My ...
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0answers
169 views

ftrace + addr2line

I want to get kernel source code file name and line number of a kernel function from the function address that ftrace outputted on Raspberry Pi 3. I tried addr2line -e /boot/kernel8.img [function ...
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0answers
127 views

LIRC Doesn't detect remotes

I've got some data that I want to send through IR, and I've got one remote working, with this config file. However, this is the only config file that LIRC recognizes. I've been putting all files into /...
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2answers
11k views

What is the vcgencmd command?

I know what it does, but what does the name mean? Is it a acronym? In one sentence, how would you explain vcgencmd to someone new to Linux?
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0answers
405 views

Linux obexd server utility OPUSH file receive

Using sdptool, I have added the OPUSH and FTP profiles against my bluetooth stack on Linux (yocto Linux to be precise). Given below are my profiles: Service Name: OBEX Object Push Service RecHandle: ...
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2answers
528 views

How to read a specific register using spi_xfer from PIGPIO

I am building a single channel LoRa gateway using the RFM95W module. I am using this github repo; single_chan_pkt_fwd, as a guide. However I am not yet using a PCB, even though it is very difficult, ...
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1answer
298 views

Display a pygame window on builroot custom linux

I'm using Buildroot 2018.02 to create a custom Linux to run my raspberry pi 3. I'm trying to display a pygame window on the external hdmi screen from command line. So far, I've been able to boot the ...
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0answers
229 views

CentOS 7 network setup

I am setting up a Pi3 B+ as a homeserver. Intended uses are running a Pi-Hole, using it as NFS share and to automate stuff like backups. I decided to use CentOS for its reputation of running smooth ...
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0answers
62 views

What does Ctrl-A do in Raspbian terminal?

In macOS terminal, I'm used to pressing Ctrl-A to move the cursor to the beginning of the line, for example when I forgot to type sudo. I tried this in Raspbian stretch lite, and it froze the system, ...
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1answer
931 views

What Pi Model & OS version is installed

Users often seem confused about what Pi model they have and what OS version is installed or how to find details. Where is this located?
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2answers
184 views

wget - options to save all new files

I am attempting to use wget to download all new versions of a single file from a server. The file is updated once an hour at an unspecified and variable time. I am running a cron script that runs ...
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0answers
40 views

Unwanted calls of program with GPIO

I configured a Raspberry Pi 2 with a button. I have a script in python, which will call a command, if someone press the button. The command doing a sip phone call to a phone server (cisco ...
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0answers
54 views

Help recovering files on Raspbian from a former WD MyBook World Edition II (Linux file system)

With my Mac I used to backup .jpg and .NEF (Nikon raw files) on a WD MyBook World Edition II network drive. After a few months I was not using it, I discovered it was not working anymore. On the WD ...
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1answer
464 views

Raspberry Pi Compute Module 3 and IO Board does not detect USB device if it's plugged in before booting

I have a Raspberry Pi Compute Module 3 mounted on an IO board, connected to a (powered AFAIK) USB hub full of devices, and running Ubuntu MATE 16.04.2, with the X server disabled. I've noticed that ...