linux

714 Articles

How-To: Super Simple Serial Terminal

May 29, 2008 by 38 Comments

This hack shows how to make a dumb terminal out of a keyboard, LCD screen, and an 8-bit microcontroller. From time to time, a portable dumb terminal can be handy for when you have to rescue a headless server that’s acting up or if you are building a minicomputer out of a WRT, or if you just want to learn how to run a keyboard and LCD screen with a microcontroller. This super simple serial terminal will use RS-232 to control a headless linux system. Additionally, you might want to check into some of the command line interface programs that allow web browsing, AIM and IRC chatting and more directly from the terminal, but nothing beats being able to track your pizzas with this device.

The Linux system in question here will be Linux Mint. It’s a young distro based on Ubuntu that’s gaining a lot of attention lately, though the principles can be used for other Linux distros.

Continue reading “How-To: Super Simple Serial Terminal” →

IKEA Linux Cluster

May 25, 2008 by 11 Comments


Building a render cluster doesn’t mean you have to spend a lot of money, even if you’re buying brand new hardware. [Janne] built this 6 unit cluster inside of a 6 drawer IKEA Helmer cabinet. He wanted the cluster to be low power and low cost. After finding a good price on 6 65nm Intel Core 2 CPUs, he found 6 cheap Gigabyte motherboards. The memory on each board was maxed at 8GB. With 24 2.4GHz cores consuming 400W, the power consumption and cost isn’t much more than a high end PC. Each board is running Fedora 8 and mounts an NFS share. Dr Queue is used to manage the render farm’s processes. [Janne] says jobs that previously took all night now only require about 10-12 minutes. The estimated capacity is 186Gflops, but plans are already in motion for a12Tflop version.

His site also has plans for an underwater camera housing like our recent post. If you want to see more IKEA abuse, check out IKEA Hacker, even if it’s not very technical.

[via Hackzine]

[UPDATE: yep, we duped ourselves]

Google Android Application Challenge Winners

May 23, 2008 by 5 Comments

The Google Android team recently launched a challenge to encourage development for their new cellphone based platform. Part of the first phase was to narrow down the 1,788 submissions to the best 50 application ideas. They’ve posted the complete list of winners on their website and put together a little slide show(PDF) as well. As part of the challenge some $10,000,000 is up for grabs from Google.

We browsed through the list and found a lot of social this and family that; nothing overly exciting honestly. There were a few interesting application ideas in there though:

  1. BioWallet – Biometric authentication system that uses iris identification.
  2. Talkplay – Video and voice message system, see and talk to your friends while on the go.
  3. Writing Pad – A unique way to enter text into your phone where common words are replaced by simple strokes.

The Android platform will probably cause the largest adoption of Linux based cellphones yet. We can’t wait to see what the homebrew community does with the platform and so much development for an unlaunched phone is amazing. Apple seems to go out of their way to lock us out, where this platform couldn’t be more open. With 3G support, WiFi, SQlite, Virtual Machines, GPS and much more what’s not to like.

Have any of you experimented with the Android SDK?

[via LinuxDevices]

Raid Your Network File Shares

December 29, 2007 by 6 Comments


[Motoma] sent in his take on the virtual RAID 5 post. He didn’t like the layered system requirements, so he put together a proof of concept that only requires a Linux box. For his proof, he used a NFS share, a SMB share and did everything from the command line. He didn’t cover FTP, but the Gentoo wiki has a nice cheat sheet for mounting FTP and folders over SSH if you want some alternatives. He uses some very interesting partition tricks to make things happen. If you need some help to get things rolling, the Ubuntu forums software raid how-to is a good place to start.

New XBox 360 Downgrade Hack

August 25, 2007 by 10 Comments


[Paul] let me know about a new way to get a hacked kernel on a XBox 360. A new timing attack will soon allow you to install an older kernel with without having the CPU key which was the catch 22 situation before. The proof of concept ressurected a bricked XBox by doing some interesting things to one of the NAND (memory) blocks on the machine.
Great news for the homebrew/hacking scene!

PS3 DVR How-To

January 19, 2007 by 8 Comments


If you glanced at the PS3 and thought it was too expensive, this might help you justify spending your green. [ken_vs_ryu] put up a mini tutorial on running mythtv under Linux on the PS3 with an external USB capture device. When you consider the cost of a decent machine, video card and blue-ray drive, it’s not a bad deal. (I’m not sure how many Plextor ConvertX encoders you can run at once.) To get things working, you’ll have to thumb through the Gentoo Wiki for the details on setting up the ConvertX.