Ruby-Raspberry-PI
First I want to walk through getting your SD Card setup:
Next we can work on getting Ruby on Rails to run on Raspberry PI device, memory looks to be an issue so be sure to use the utility to figure out your memory.
First Section starts here: Setting up Raspberry PI on MacBook Air Setup your SD Card, Here are some images and sites to help you: http://www.raspberrypi.org/downloads/ Get an SD Card, you can follow directions on the www.raspberrypi.org site, first you will want to clean any old files off the SD Card, if you have a memory card you want to be sure is wiped you can take a look at this site:
There are some great instructions on the site - http://www.sdcard.org also have a look at this site - http://www.raspberrypi.org/help/noobs-setup
Here are the instructions if you want to start from scratch: http://elinux.org/RPi_Ruby_on_Rails
Download the Wheezy version Use the SD writing tool to copy *.img file to the SD Card -copy image to SD from a file:
Commands to help troubleshoot: -always login user: pi -switch to super user: sudo su -show memory: free -htl
Update Raspberry-PI Firmware: Log into the board via SSH or on a local keyboard and run the following commands:
sudo apt-get update this next line command take awhile to run sudo apt-get upgrade
sudo apt-get install git-core sudo wget http://goo.gl/1BOfJ -O /usr/bin/rpi-update sudo chmod +x /usr/bin/rpi-update cd /usr/bin (change to the /usr/bin directory) sudo rpi-update
You should see the following: pi@ruby-pi-chas1 /usr/bin $ sudo rpi-update *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom *** Performing self-update % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 135 100 135 0 0 430 0 --:--:-- --:--:-- --:--:-- 579 100 7026 100 7026 0 0 13054 0 --:--:-- --:--:-- --:--:-- 13054 *** Relaunching after update *** Raspberry Pi firmware updater by Hexxeh, enhanced by AndrewS and Dom *** We're running for the first time *** Backing up files (this will take a few minutes) *** Backing up firmware *** Backing up modules 3.12.20+ *** Downloading specific firmware revision (this will take a few minutes) % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 100 168 100 168 0 0 608 0 --:--:-- --:--:-- --:--:-- 848 100 21.1M 100 21.1M 0 0 682k 0 0:00:31 0:00:31 --:--:-- 1341k *** Updating firmware *** Updating kernel modules *** depmod 3.12.21+ *** Updating VideoCore libraries *** Using HardFP libraries *** Updating SDK *** Running ldconfig *** Storing current firmware revision *** Deleting downloaded files *** Syncing changes to disk *** If no errors appeared, your firmware was successfully updated to 05ae751d5b4f6be8fdd1882063540b56a0933abb *** A reboot is needed to activate the new firmware
After you complete the last update command, reboot your Pi and then run this command to view memory usage:
free -h
If all goes well, you should see something like this: free -h
Total used free shared buffers cached
Mem: 438M 98M 339M 0B 21M 40M -/+ buffers/cache: 36M 402M Swap: 99M 0B 99M
Once you complete all the above, your OS will now be able to make full use of the board and all the RAM and we can start on setting up the Ruby on Rails on your Raspberry PI device.
Getting Ruby on Rails to run on Raspberry PI device
This is where I will put notes on how to get Ruby on Rails to run on Raspberry_PI
Be sure to use a good fast SC memory card, if you look at the SD card you will notice a Class 4 or Class 8 which is really common. I would recommend you find a Class 10 memory card, if you plan to do any services like media stream, RubyOnRails, Apache Web, ect. I would recommend you find a Class 10 or better memory card.
I am doing testing on a 512mRAM, ModelB, Raspberry_PI unit, using an SD Memory Card (Class 10)
I have had some problems with memory, be sure you use the command 'free -h' it will show you the memory avaiable and used. Also you want to be sure you have your updates installed so be sure to run 'sudo apt-get update' so you have all your system updated installed.
Once you get your SD Ram setup the way you want be sure to make a copy and put into an image then place in a safe location, put it up on GitHub and share with everyone else. I will have an \images folder so you can look there to see what I have been able to get working.
Best wishes, happy coding, pull and update as you see errors in my write-up, thanks in advance.
Roger Swanson Charleston, SC http://rogerswanson.me http://cneworks.com Twitter: @roger_swanson
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