Raspberry Pi Forums

sprinkmeier

bad power is the single bigest cuplrit for random crashes and misbehaviours. Do yourself a favour and get a decent powersupply. If your Pi is running well and stable, then play with the cheapies. If it starts to misbehave you'll know why. I've bought dozens of these for class: http://au.element14.co...

sprinkmeier

A switch like this would power off the Pi abrubpty. Eventually you'll nuke your SD card doing that...

Look for some of the projects here using the GPIO pins as power/reset buttons.
Pins 5 and 6 are ideal (one is ground, one is tied high, all you need is a pushbutton switch!)

sprinkmeier

The hardware wouldn't know the differance between an incoming connection or a reply packet to an outgoing connection.

Did your RasPi's IP address change?

sprinkmeier

try running

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$ sudo apt-get update

first.

If that doesn't work post the output and error messages.

sprinkmeier

On occasion these options come in handy for making HDMI monitors work:
http://elinux.org/RPi_config.txt#Video_mode_options

sprinkmeier

I've done the Python version of these, they seemed decent enough:
http://www.learn-c.org/
http://c.learncodethehardway.org/

sprinkmeier

The python-serial package gives you easy access to a serial port from Python.
Something like dyndns should allow the systems to find each other.

sprinkmeier

Once it's installed the easiest way to use it is using the pkg-config utility. Check that it's lists: $ pkg-config --list-all | grep cv I don't hace it installed, so I'll use the SQLite3 library as an example: $ pkg-config --list-all | grep sql sqlite3 SQLite - SQL database engine Now I can query th...

sprinkmeier

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$ sudo apt-get install libopencv-dev

If that's not the right package, see

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$ dpkg --search libopencv*

sprinkmeier

Unless you specifically want to know about Linux on the Pi why not try Linux from Scratch?
http://www.linuxfromscratch.org/

sprinkmeier

is the Raspberry Pi set to forward traffic?

in /etc/sysctl.conf un-comment net.ipv4.ip_forward=1 and run sysctl --load

sprinkmeier

I've read about how to do that. But I've been unable to figure out how to determine if it originated in/outside the network. # allow local net iptables --append INPUT --source 10.2.1.0/24 --jump ACCEPT # allow VPN iptables --append INPUT --source 10.8.0.0/24 --jump ACCEPT # allow OpenVPN iptables -...

sprinkmeier

Is samba available directory or only through the VPN?
Keeping samba behind OpenVPN will decrease your attack-surface considerably.

look at the --in-interface and --source parameters for iptables on how to control access base on interface and source address.

sprinkmeier

For talking to a Pi from a windows box I'd suggest PuTTY
http://www.chiark.greenend.org.uk/~sgtatham/putty/
and WinSCP
http://winscp.net/

sprinkmeier

df --hum / lets you see how much diskspace is used. If you prefer a GUI, sudo apt-get install baobab baobab At around $1/G for a decent SD card it's probably not worth it trying to save a few MB here and there... Don't make the Pi accessible from the internet and 90% of your security worries are so...

sprinkmeier

I recommend against un-installing stuff until you're past the Noob phase.
If something goes wrong and you ask for help the less standard your install is the more difficult it will be to remotely debug and help.

If you really want to remove something get rid of nano and install vim (just kidding!)

sprinkmeier

as klricks suggested use a Linux computer to edit the file. If you don't have one just get a live CD/DVD and boot your PC/laptop off it. This will let you mount the SD card's ext4 partition and fix the file. This link shoudl get you an Ubuntu Live DVD: http://www.ubuntu.com/download/desktop There ar...

sprinkmeier

Can you configure the device manually (i.e. is the problem with the device or with the way it's configured):

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sudo ifconfig eth0 192.168.2.2/24
sudo ip route add default via 192.168.2.1

sprinkmeier

Can you post the output of

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sudo dmesg -c
# lots of stuff, probably going back to boot, don't post this bit
sudo service networking restart
sudo dmesg -c
ifconfig
# some stuff that should be relevant to the network bouncing

sprinkmeier

forgot to mention etckeeper, a wonderful tool for tracking/documenting/undoing changes in /etc

sprinkmeier

unix tends to be case sensitive, I wouldn't use Address etc.
auto eth0 seems to be missing

sprinkmeier

1. How can you centrally manage these devices? for example, if we deployed 100 of these how would we update 100 SD cards remotely to either a new version of the software or to make config changes once we have done the initial deployment and builds? for up to a dozen boxes check out clusterssh . I r...

sprinkmeier

post your /etc/network/interfaces Something like this should work: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.42 netmask 255.255.255.0 gateway 192.168.0.1 Also... install etckeeper . it takes snapshots of your /etc directory allowing you to undo changes. By def...

sprinkmeier

#! /usr/bin/python2.7 import serial # memory filesystem, data lost when power goes off, but doesn't wear out your SD card DIR='/dev/shm' # your home directory import os DIR=os.path.expanduser('~') # pretty much anywhere else is going to be readonly to a normal user like "pi" # install apache, let p...

sprinkmeier

Is your WiFi dongle on the verified products list?
http://elinux.org/RPi_VerifiedPeripherals

Search found 410 matches

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