EBC Setup Scripts

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thumb‎ Embedded Linux Class by Mark A. Yoder


This is a guide to the many script I've written that make getting the Bone running much easier. Do this after you have Updated the OS and used git to get the support materials.

Some of the things listed here have to be done only once, others are done every time you reboot, or more often.

Do only once per Linux host install

The first time you set up a new Linux install on your host computer, edit the file /etc/hosts and add this at the end:

host$ sudo vi /etc/hosts	bone

Now rather than typing ssh -XC root@ you can just enter ssh -XC root@bone. It saves lots of typing.

Do when the bone is running a new image

If you are running an SD card that's bigger than 4G, run:

host$ cd BeagleBoard/exercises/setup
host$ ./grow_partition.sh

This will make the partition as large as possible, and then reboots.

There are a number of files I like to have on the Bone. Rather than remember what they all are, I just put them in a script and run it on the host. Take a look at my install.sh script.

host$ vi install.sh

You'll see things like

  • Setting the Bone's date to the host's date
  • Copying the exercises to the bone rather than using git clone (much faster on a slow link).

There is a line that starts with ssh root@$BONE " that runs all the following commands, up to the closing " on the bone. These commands

  • Set up git
  • Copy over .bashrc
  • Set the timezone

and so on.

Edit install.sh to install what you want.

Every time you boot the host

Every time I boot up the host I run:

host$ cd BeagleBoard/exercises/setup
host$ ./ipMasquerade.sh eth0 

Where eth0 is the network interface you are using. If you are wireless you may use wlan0 instead. This sets up you host to take internet requests from the Bone and send them to the internet. That is, your Bone is masquerading as your host.

Do this once after the Bone boots up

The install.sh script above does many things that only have to be done once after installing an image. Here is what has to be done every time the Bone is booted up.

host$ cd BeagleBoard/exercises/setup
host$ cat firstssh.sh
host$ ./firstssh.sh

When you look inside firstssh.sh you'll see it sets the Domain Name Server (DNS) on the Bone so it uses the host as a gateway and it sets the correct date. Once that's done it ssh's over.

If you always use firstssh.sh the Bone will always be on the network and have the correct date.


IIT Mandi uses a proxy, so the following might be needed

apt-get install dconf-tools
for proxy in ftp http https socks 
   echo $proxy 
   dconf write /system/proxy/$proxy/host "''"
   dconf write /system/proxy/$proxy/port "'8080'"

I don't know if this is needed on the Bone, but it's needed on the host to reach the Bone

dconf write /system/proxy/ignore-hosts "['localhost', '', '', '::1']"
dconf write /system/proxy/mode  "'manual'"
dconf write /system/proxy/use-same-proxy  "false"
dconf dump /system/proxy/  

export http_proxy=
export https_proxy=

From http://jjasonclark.com/how-to-setup-node-behind-web-proxy/

npm config set proxy
npm config set https-proxy

git config --global http.proxy
git config --global https.proxy

In summary

Normally the Bone is already set up, so all I do after booting the host is

host$ cd BeagleBoard/exercises/setup
host$ ./ipMasquerade.sh eth0
host$ ./firstssh.sh

and I'm logged onto the Bone and it has access to the Internet through my host.

thumb‎ Embedded Linux Class by Mark A. Yoder