Joe Fleming dot net

Many ISPs these days employ traffic shaping to make their networks run smoother. In the most basic sense, they give priority to more critical traffic, like VoIP for instance, and slow down less important traffic, like HTTP and Torrents. Lately, many ISPs have been doing their best to slap down any peer-to-peer (p2p) traffic, especially Bittorrent, because users are are consuming more bandwidth than the ISPs can handle. This is a result of the ISPs grossly overselling their networks and expecting most consumers to use a tiny fraction of their connection, a practice that worked great until more and more users became heavy consumers thanks to sites like YouTube and technologies like BitTorrent.

Now, I’m not saying that ISPs are doing anything wrong in overselling per se, but I do have a problem with them not properly planning for the future. Now that they have this bandwidth problem, instead of expending their networks to try and meet demands, they are using more and more restrictive filtering, sometimes even resorting to hacker-style packet injection in their traffic, nearly crippling whatever technology it is that people would like to use (and pay to use). Not only is this a very shady thing to do on their part, but in nearly all cases, they hide this fact from consumers and outright deny that anything is going on. They get away with all of this thanks to their monopolies in their select markets. But I won’t get in to all of that.

As in any other situation where one party tries to control another party, people are finding that there are many ways to get around this type of filtering.

I’ve seen all kinds of really cool projects that use the fancy new Arduino microcontroller. I’m not the biggest fan of C or C++ (to be honest, I hate them both), but the Wiring model and the Processing environment seems interesting. So much so that I decided over this long weekend that I wanted to get in on the fun on purchased a kit from Adafruit. Sure I could have gotten it cheaper and ditched all the extras, but it seemed reasonable given that it comes with the Protoshield, breadboard, a couple power options, USB cable and some extra goodies to get me started out of the box. I figured it was all worth it.

I have some ideas for the normal automated plant watering, temperature-based fan controls and email and chat LED alerts, but I don’t have any revolutionary plans for the device. Talking to Jason, he gave me the idea of controlling motors with the unit which got me thinking back to the Assembly-based cars we coded for in college. I can see putting together a little car that can sense and route around obstacles and he suggested mounting some IR transmitters to turn TVs in the area on and off at random, which would be pretty fun too. I caught this “Large scale DOT Matric printer” on Hackaday too, which made me think about feeding images into the device and having it drive motors to actually create them on a large scale either like a DOT Matrix printer or a planer.

Anyway, we’ll see how much I do with this thing and how far I get. If nothing else, it’s an excuse to get back into hardware hacking. And if things go well, I can actually start posting projects up here. If you have any ideas for cool things to try out or questions about the unit, please post in the comments.

I’ve been growing increasingly concerned with the quality of hard drives being made today. It used to be that a hard drive would last you many years before you’d see a failure out of it. In fact, I still have hard drives that date back to the early 90′s that continue to work to this day. I can’t say the same for more recent drives, especially those that have been made in the last year or two, as I’ve just been constantly dealing with failed hard drives on my machines. I’ll preface my most recent experience with a little history first.

The Preface

I recently upgraded my raid machine, which is simply a low-power PC in a large case with four hard drives in it all set up as a Linux software RAID-5 array. Previously, I had used four 160GB IDE drives hooked up in the machine using a PCI controller card. That was fine for storage a few years ago when I built it, but recently I’ve managed to fill the thing, so it was clearly time for an upgrade. Considering that the entire array was less than a single 500GB drive, it’s not too surprising.

My plan was to buy four 500GB drives and increase the array to 1.5TB, but before the planned migration, I decided to buy a new 500GB drive on which to back up the current array. Sure I could have replaced the drives one by one, rebuilding the array each time and expending the partition when I was all done, but the machine was never quite set up the way I wanted it to be, and since I wanted to switch from IDE to SATA, I would have had a lot of tweaking to do. I also wasn’t sure how far I was stretching the PSU in the machine, because while it was running a low power VIA CPU, it was still powering five hard drives (the array and the main system drive). Backing everything up to another drive and starting a new array from scratch just made more sense, so that’s exactly what I did.

As you may or may not know, Ubuntu doesn’t include a build environment by default. What this means is that in order to compile program from source, you’ll need to get the build environment on your own. This is simple enough though, as outlined below:

sudo apt-get install build-essential checkinstall

This will install 2 things, the build environment (build-essential) and a program that will allow you to install your compiled code as a .deb package (checkinstall). Installing your code as a deb means that you can easily remove it on your own using apt instead of hunting down files and removing them by hand. Instead you just issue apt-get remove PACKAGE as root and it’s gone.

I learned this while getting a VPN tunnel through Torrent Freedom working. In order to use their service, you have to be running a Beta build of OpenVPN. Since the version in the Ubuntu repository is NOT the Beta, it won’t work with that version. So, you have to roll your own, but it’s easier than you might think.

This may not only apply to Ubuntu, but it’s the only Linux distro I tried it in (since it’s what I run). I think any distro using ALSA will work the same.

The problem is that I have a SoundBlaster Live card as well as an onboard VIA sound chip. Since Linux ignores the system BIOS, disabling the onboard sound doesn’t do anything. Obviously I don’t want to use the onboard sound card or I wouldn’t have bothered putting the SBLive card in in the first place. Simple fix; we’re going to change the default card to the SBLive card!

$ asoundconf list

Names of available sound cards:
V8237
Live

Your list may differ, but you should be able to find the card you want. In my case, it’s the Live card. So….

$ asoundconf set-default-card Live

Note that I did not use sudo to list or change anything, it’s a user setting. Now, restart any sound applications and you should be up and running. This should live through reboot as well.

If you Google “ubuntu flash sound” you’ll find a LOT of information about flash sound problems and how to fix them. The consensus seems to be installing alsa-oss and configuring Firefox to use it. However, try as I may, I couldn’t get it to work. Then I read somewhere that you needed to set other programs to use Alsa instead of OSS, and that did the trick. YouTube seems to lock up Firefox from time to time so I’m still waiting on a more permanent fix, but this works well enough for now.

All of the domains that I oversee (and those of most all my friends as well) all live on a server on DreamHost. Their plans are amazing; tons of storage space, tons of bandwidth, unlimited domains and emails, shell access and a slick administration tool. That being said, I’ve always stuck with PHP because it’s all I know and it’s very simple to get working. That all changed recently when a friend of mine and I decided it would be fun to learn Python.

DreamHost is an amazing hosting company. Not the best or fastest servers in the world, but by FAR the cheapest and plenty enough for our needs (and apparently the needs of MANY others too). I learned this weekend that their support for running python over their FastCGI (which you have to use) doesn’t work as advertised though. And even when I scoured the ‘net for answers they all said the same thing. The defacto tutorial seems to be A tale of Pylons, Python and FastCGI on Dreamhost, referenced by several sources and many people in the forums. Sadly, that tutorial doesn’t work as-is, if it ever did. It’s extremely close, but not complete. I also found a tutorial for rolling your own Python and combined the two (along with this forum post) to get it all working. This worked for me and I’m guessing it’ll work for a lot of other people trying to run Python on a DreamHost server (and not using Django I should add).

I’ve been using VirtualBox for a while now after finding it in Automatix in Ubuntu. Anyway, until now, I’ve been perfectly happy not using USB devices with it. For the most part, I still am, but I was curious how hard it was to set up, so I looked it up. Here’s what I found (originally posted here)

-Install the other OS

-Create a group called “usbfs” and add yourself to it.

groupadd usbfs
usermod -aG usbfs 

-Edit /etc/fstab and add the following, changing the group ID to match that of the usbfs group you just added (tail /etc/group)

# 1002 is the USB group ID
none /proc/bus/usb usbfs devgid=1002,devmode=664 0 0

-In terminal, issue the following command to see available USB devices

VBoxManage list usbhost

-Use the output of this command to set up the filters for USB devices under VirtualBox.

-Reboot your machine. This is required to both recognize the new group and new mounting options

*USB DEVICES HAVE TO BE UNMOUNTED BEFORE VIRTUAL MACHINE CAN RECOGNIZE THEM*

There it is. Now, simply unmount the USB device from the host OS before booting the guest and you’re good to go.

I’ve been running Ubuntu Linux for a few years now and it’s by far my favorite distro out there right now. It’s simple to use, quick to install and everything works out of the box. I used to run Gentoo but I got tired of compiling everything all the time to install things and spending days on end configuring the machine just to use it. I’m a huge fan of the debian packages now and Ubuntu makes everything that much easier.

That said, the install on my laptop (a Dell Inspiron 8500) has been bugging me for a while. The touchpad on the thing just wasn’t sensitive enough and the Ubuntu configuration did nothing to change the speed. Today I did a little Googling and found this site. On it were some instructions on how to make the Synaptics touchpad faster.

Basically, all you need to do is edit the /etc/X11/xorg.conf file to change the speed settings. Locate the InputDevice section that uses the synaptics driver and add the following lines:

Option  "MinSpeed" "0.5"
Option  "MaxSpeed" "3"
Option  "AccelFactor" "0.05"

Note that these numbers are a little different from the site linked, but they feel right on my machine. I am running on a 15″ WSXGA+ screen after all, so I have a lot more pixels to traverse. Play with the values a little and see what works for you.

EDIT: Apparently Ubuntu has taken up the HAL system. Jay took the liberty of posting an update to tweaking your mouse settings. Kudos!