Wednesday, September 23, 2009

Keryx : Download ubuntu updates to a computer with no internet

Part of the initial process before the computers get sent out will be to have the computers mostly updated.

Instead of copying the software from one computer to the other, it would be alot easier to simply have a flash disk, or cd with some mostly recent updates. Once the computers get sent out it will be up to the teachers to keep the computers updated. Software like apt-proxy and squid will help make it less bandwidth intensive to keep the machines updated.

Keryx is fairly intuitive, but I had a bit of a problem with it because I was expecting to have to take the /var/lib/dpkg/source file to the computer with internet.

Keryx does everything for you. Take it to the computer with no internet, start a project, and it copies all the relevant files.

Then take it to the computer with internet access.
First you download the repository list (sudo aptitude update). Then there's an easy button to download updates (sudo aptitude full-upgrade).
There's also a list of all applications (based on the reposotiroy list it downloaded) that can be downloaded. Since it did a check on the original computer before you switched computers, it only downloads the files you need and don't have.
All the files it downloads are conveniently located in a keryx/projects/<project-name>/packages/
This makes it nice for me because since I'm using it for templating I can simply copy them onto a CD and run updates this way.

Maybe I can keep updating this "template" so that I don't have to start over, but can just update the current downloads to be the newest.

Anyway, for a more "official" tutorial, check out

I'll update the post and post comments on any updates as I use it.

Saturday, September 19, 2009

Routing with an Ubuntu machine

Ubuntu is great with networking. I had to fool around with it a bit, but to get the routing set up like we planned wasn't too hard in the end.

After the router was set up and initially plugged in, both ubuntu computers attempted to Automatically configure the network settings.
Unfortunately they both failed after a bit.
This whole time the Safaricom Cellular modem was attached, and connected. The computer connected to the interent this way could connect to google, but the other computer couldn't.

First Go into the network settings (System > Preferences > Network Connections  OR right click on the Network connection icon in your system tray), unlock, and edit the "Auto Eth0" connection.
On the last tab, IPv4 Settings, choose "Shared to other computers"

When I did this on both computers (on just the eth0 connection), I could connect to the internet on both computers even though only one was directly connected to the Safaricom Modem.