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17
votes
4answers
3k views

How can I put my HDMI display into (and out of) power save mode?

I am using a Raspberry Pi to run an information display in an office. I want the display in power save mode when outside of business hours. I was going to use cron to execute something at the ...
9
votes
1answer
532 views

Redirect linux console on boot

Is it possible on boot to redirect the console output to a screen session? The server has no monitor attached, and I'd like to be able to see the primary console output. I've seen other posts about ...
8
votes
1answer
277 views

RasPi - USB microphone locks up

On my RasPi board, Debian Linux, the USB microphone occasionally gets locked up such that nothing can use it. The microphone has a LED which is usually flashing, when it's locked, it turns off. The ...
7
votes
2answers
1k views

Optimizing a `while` loop

I have created a mini script to reboot my Raspberry Pi upon the push of a button. The script simply uses wiringPi (gpio command) to set pin 0 (pin 17 in Raspberry Pi standard numbering order) to ...
7
votes
1answer
513 views

Raspberry Pi, serial console, minicom, and gnome-terminal

I'm trying to access my raspberry pi via its serial console on the gpio pins. It's working fine through a USB-3.3v serial dongle. However, there's a problem with long lines and long screens not ...
7
votes
1answer
859 views

Problems running python script from motion

I'm trying to set up the raspberry pi with my webcam as a motion detecting cctv that uploads the videos to google drive using Jeremy Blythe's script I have motion working correctly and the python ...
6
votes
3answers
2k views

Mounting and modifying a loopback file without sudo/root, is it possible?

I'm trying to adapt a tutorial into an easy to use script http://qt-project.org/wiki/RaspberryPi_Beginners_guide. I'm trying to reduce the need for sudo/root as much as possible (preferably, only ...
6
votes
1answer
1k views

apt-get -f install is stuck on “corrupted filesystem tarfile”

I am having issues with apt-get on my Raspberry Pi. This is the output when I try and install a package: pi@raspberrypi ~ $ sudo apt-get -f install cowsay Reading package lists... Done Building ...
6
votes
1answer
4k views

How to get my bluetooth keyboard to be recognized before log in?

Because I need to use my keyboard to log in, I would like my keyboard pair automatically, pre-log in. I am using Debian squeeze, and am new to linux. All tutorials I have found seem to require the ...
5
votes
1answer
1k views

Arch ntpd/ntpdate not synchronizng clock

My raspi running Arch isnt updating time with NTPD. Im running [root@fatpi ~]# cat /proc/version Linux version 3.10.28-1-ARCH (nobody@root-armv6-copy) (gcc version 4.8.2 20131219 (prerelease) ...
5
votes
1answer
141 views

Secure access to remote SSH tunnel

So I wish to be able to access my Raspberry Pi (which I keep at home behind a firewall) remotely. One option is to use a static IP address, but as a poor student I don't want to fork out for one, and ...
5
votes
3answers
1k views

How can I tell if my wifi dongle has access-point capabilities?

I have a Realtek 8191SU USB wifi dongle for use on my Raspberry Pi. I'm trying to set up a wifi access point using this tutorial. However, I'm running into a few errors, and I suspect it might be ...
5
votes
1answer
176 views

Stream audio from Linux to Raspbmc

I'd like to stream audio (mainly Spotify) to my Raspberry Pi. I am running Fedora 19 and Raspbmc is running on the Raspberry Pi. I'd like to stream wireless. My first thought was to use AirPlay, as ...
4
votes
1answer
2k views

How can I take a screenshot in LXDE using scrot and the Print Screen button on my keyboard?

I have already installed scrot following the instructions here. The Windows Manager appears to be Openbox.
4
votes
1answer
155 views

Reset running process when certain ammount of memory is consumed

I'm running a Hydra on Rasppberry PI. There were some problems with the program, but aside from these, there is a hidden memory leak in the program. The source is pretty big and really can't find the ...
4
votes
1answer
165 views

How Can I Automate the Change between a Python Script and a Nohup Python Script?

I have a Raspberry Pi connected to a digital temperature probe, which measures my fermenting beer. A python script reads the temperature every second and prints it to the console, and stores it in a ...
4
votes
2answers
523 views

How can I launch applications from 2 ttys on launch?

I've currently got 2 ttys logging in automatically, but I need to launch a node script from one and a C program from another as soon as the device loads. The device is a Raspberry Pi running ...
4
votes
0answers
376 views

Problems with printer page format in CUPS

I'm setting up print server for custom thermal printer on RaspberryPi running Linux Debian and I have a strange problem. If I print a test page it prints OK, same with web page from Firefox, but when ...
3
votes
4answers
348 views

Execute a program at login

I'm running Arch-Linux ARM on a Raspberry Pi. My project goal is to have a barcode scanner attached to the Pi that forwards the scanned messages to a server in a LAN. To harden the system against ...
3
votes
2answers
74 views

fake monitor in a headless device

I have a raspberry running headless (no monitor nor TV) I have some programs that need X11 environment to start (but for nothing more) like for instance a midi sampler. I tried forwarding the X11 via ...
3
votes
2answers
167 views

Mount harddrive under different name?

When I plug a external HDD into my Rasberry Pi (running Raspbian) it automatically mounts as /media/2ad496774-3eb8-47bb-2bf5e-788f8eb89e54 where folder underneath it are then accessible by going ...
3
votes
1answer
55 views

how to write a startup dependency on Internet availability?

Some of the services on my Raspberry Pi (~ Debian) depend on the availability of Internet (especially ntpd, for cryptic reasons). Specifically, the availability of a network device or a link being up ...
3
votes
1answer
421 views

Streaming music to a raspberry pi

I have a laptop and a raspberry pi connected to a soundsystem via the jack output. I'd like to have the output of the soundcard of my laptop redirected to the raspberry through my local network. I ...
3
votes
1answer
3k views

Raspberry Pi Wireless USB stick

I recently acquired a Raspberry Pi, and have installed Debian Squeeze on it, and after doing a small bit of research (I'm not too proficient with Linux) I found and ordered a USB wireless dongle ...
3
votes
1answer
32 views

Arch Linux RPI: How accurate is the time on the RPi in Linux?

Currently I'm working on a application on my RPi which will be monitoring a set of GPIOs in real-time where the exact time when the GPIO turns HIGH is crucial for my application. And I need to know ...
3
votes
2answers
90 views

Pipe / direct image / video output to foreign server

I am working on a Project that involves taking the output from a Webcam which is in either jpg or h.264 format, and outputting it to a foreign server (HTTP / FTP would work, I am open minded). What is ...
3
votes
1answer
153 views

Arch Linux Encrypt entire drive

My Raspberry Pi is set up as a PHP MySQL (Percona) server and I think that I have managed to make it quite resilient against online attacks but it is still very vulnerable against someone just taking ...
3
votes
3answers
4k views

Is it possible to repair Linux system files? Or is reinstall the only option?

I've got a question about something that always bothered me about Linux. On Windows, if any of the system files become damaged, you can just reinstall the system files, without having to re-format ...
3
votes
1answer
107 views

Init script leaves thousands of defunct processes

My problem is that I have an init script that is generating thousands of defunct bash processes. My goal is to have a program called "fr24feed" in its own screen session on boot. After looking at ...
3
votes
1answer
299 views

Tunnel AFP over SSH over Internet

I can't seem to figure out how to connect to AFP over SSH. Here is my setup: [Raspberry Pi] <---> [router] <---> (Internet) <---> [Client] I'd like to be able to connect to my ...
3
votes
1answer
294 views

Why does wlan1 not get a static IP?

I have a Raspberry Pi with two USB wlan adapters. wlan0 is configured with DHCP and wlan1 is configured with a static IP address and hostapd (access point) is running on this interface. The adapter ...
3
votes
2answers
3k views

OMXplayer and HDMI audio on the Raspberry Pi

When I try playing video using the command: omxplayer -o hdmi sound will not work unless I also include the -r switch. The only problem with this is when the video is done it leaves a black screen ...
3
votes
1answer
2k views

SSH not landing in the home directory

I have recently installed Raspbian into a Raspberry Pi. As part of the installation process I changed the user name and group from the default (pi) to my own (let's call it user) using usermod and ...
3
votes
1answer
389 views

Disable PIN request for pairing on Raspbian

I'm running a Raspberry Pi with Raspbian Wheezy. I have a BT (Bluetooth) dongle attached to one of the USB ports (I have a model B RPi), I've downloaded and installed the following packages: ...
3
votes
1answer
3k views

Using DNSMasq for Local Hostname Resolution

I'm working on setting up a home intranet for me and my roommates. My idea is that we'll be able to store things like past utility bills in a place that's more accessible than a drawer in the kitchen ...
3
votes
0answers
301 views

How can I connect to my RPi NFS server using version 4?

I've set my Raspberry Pi up as an NFS server, but I cannot connect to it with NFS version 4. However, version 3 works. From my Kubuntu 13.04 client: $ sudo mount -t nfs -o proto=tcp,port=2049,vers=4 ...
3
votes
0answers
624 views

How do I reset a USB device using a script?

I have a USB GSM modem that does not always work property (Huawei E367u-2) Sometimes it gets reset (USB device disconnect/reconnect in logs) and when it comes back up, it has different ttyUSB numbers. ...
3
votes
1answer
794 views

How do I mount a Windows folder with cifs on Raspian

I'd like to access the music library from my desktop with my Raspberry Pi, and I'd like to do this via Samba/cifs. I did the following: Set the folder Q:\musik as a shared folder on my Windows ...
2
votes
2answers
35 views

Automatically reboot, if no wifi connection for a certain time

It seems that my Raspberry Pi server loses wifi connection after a random time and is somehow not able to recover automatically. Usually a reboot done by hand resolves the problem. I would like to ...
2
votes
1answer
802 views

How to setup a RAID system using USB sticks as storage media

I want to create an inexpensive self-hosted private git server with redundant storage. To that end I have bought a Raspberry Pi and configured both git and ssh on the Pi. I can access the Pi both from ...
2
votes
2answers
157 views

Arch Linux run script a minute after boot

I have set up a bridge between eth0 and wlan0 with netctl. It works fine if I tell it to configure eth0 and wlan0 at startup and then for me to manually start the bridge after it boots. If I tell the ...
2
votes
1answer
798 views

“No such file or directory” when executing a cross-compiled program on a Raspberry Pi

I recently bought a Raspberry Pi. I already have configured it, and I install a cross compiler for arm on my desktop (amd64). I compiled a simple "hello world" program and then I copy it from my ...
2
votes
2answers
1k views

run executable on boot

For the life of me, I cannot get this to work. I'm running Debian on Raspberry Pi. running this command from CLI: /home/pi/domotiga/DomotiGaServer.gambas -d runs my home automation server. How ...
2
votes
1answer
68 views

Linux motion user - run it as ssh key as pi to remote server

This question is related to the two other questions I had earlier, about enabling Raspberry Pi to act as a motion sensor that will try to ssh into a more powerful server when it detects motion (the ...
2
votes
1answer
110 views

Redirecting Request on Device in Access Point Mode

I have a Raspberry Pi with a wifi dongle that is configured for Access Point mode (wifi hotspot). When a user is connected, I want to redirect any url they enter to a specified IP (the devices ...
2
votes
1answer
56 views

Can I apply `tmux` to a bash script?

Is it possible for me to use tmux to SSH into a Raspberry Pi, run a Bash script, and then leave the session (from my laptop), while the Raspberry Pi continues to run the script?
2
votes
1answer
283 views

Use the raspberry pi as a source of entropy for /dev/random

I'm trying to see if I can use my raspberry pi's hardware RNG as a source of entropy for /dev/random. Mostly to see if I can get it to work and find yet another use for this nifty little device. Of ...
2
votes
2answers
2k views

Intermittent ping times on a raspberry pi wifi access point

I have set up a raspberry pi as a wifi access point. At this point, all I want to do is ssh the rpi. I'm finding that the ssh sessions hang for 5-30 seconds ever 1 to 6 minutes or so. My laptop is ...
2
votes
5answers
4k views

Cannot delete bridge - “bridge br0 is still up; can't delete it”

I have the same problem as this guy : Bring down and delete bridge interface that's up But that solution does not work for me. I remove all interfaces from the bridge using brctl delif . I then ...
2
votes
2answers
879 views

Why is rcS required after file system is mounted by the kernel?

I am a beginner in embedded Linux, I have compiled the kernel without initramfs and kernel is booting fine. But It shows me rcS file is not found I have put it in /etc/init.d/rcS and my rcS file look ...