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Post thumbnail of Speed up your OLPC XO laptop significantly without tweaking
9 November 2009
Continue reading Speed up your OLPC XO laptop significantly without tweaking

Speed up your OLPC XO laptop significantly without tweaking

Switch to the console by pressing CTRL-ALT- (The neighborhood button is the one on the left with the most dots where you see other XO’s and wifi hot spots around you) and install xcompmgr.

Post thumbnail of wxPython calculator example skeleton code
17 October 2009
Continue reading wxPython calculator example skeleton code

wxPython calculator example skeleton code

I didn’t find a glade template for this one, but I’m starting to lean away from using a gui builder. It seems more trouble than it’s worth.

Post thumbnail of If netbooks start using ARM chips, how will Microsoft survive?
14 October 2009
Continue reading If netbooks start using ARM chips, how will Microsoft survive?

If netbooks start using ARM chips, how will Microsoft survive?

I joke, I joke, but what will they do? Perhaps it will just mean an even cheaper price point as microsoft takes a loss like they did with the original Xbox. When netbooks first came out, they only ran Linux, and microsoft got scared and changed their mind about ditching XP. It’s too bad the consumer demand for XP over Vista never influenced their decision. That would be out of character for microsoft.

Post thumbnail of RFID attack and defense tool - The ProxPick
4 September 2009
Continue reading RFID attack and defense tool - The ProxPick

RFID attack and defense tool - The ProxPick

All of the firmware is covered under the GPLv2. I can see this being popular with high school kids forced to carry RFID tags while attending school. I like the scanning detection capability, and the active shield especially. And “Wall-of-Sheep”, a nod to DefCon perhaps? ProxPick’s decode routines are capable of reading and decoding
other 125KHz tag formats. Quick, hide your passport!

Post thumbnail of Balance shafts in an internal combustion engine
24 August 2009
Continue reading Balance shafts in an internal combustion engine

Balance shafts in an internal combustion engine

The frequency of the vibration is twice the engine RPM, while the strength of the vibration is determined by the rod to stroke ratio and the mass of the reciprocating parts. The heavier the pistons and connecting rods, the greater the amplitude. The larger the stroke is compared to the bore, the larger the connecting rod angle becomes. The greater the angle, the more piston speed is affected. The reason that motors such as the Honda H22 and the Mitsubishi 4G63 have balance shafts is because of their displacement size and long stroke compared to small piston bore. Smaller motors (such as the B16A and B18C5 don’t have these balance shafts because of their smaller size and lower weight.

Post thumbnail of Instakill SSH sessions to mess with ssh-happy users on your box
14 August 2009
Continue reading Instakill SSH sessions to mess with ssh-happy users on your box

Instakill SSH sessions to mess with ssh-happy users on your box

Want to have some fun with users that keep ssh’ing to your box? Let them in, then kill them right away. I don’t even remember when/why I wrote this silly script, but here it is. There’s a lot better ways you could do this, and if you want any real ssh security, don’t even let them log in at all.

Post thumbnail of File System vs ATA vs Flash vs SSD
8 August 2009
Continue reading File System vs ATA vs Flash vs SSD

File System vs ATA vs Flash vs SSD

The filesystem’s view of the world
The filesystem is responsible for a number of things, like permissions and name lookup, but none of those has an impact on where it puts blocks on a drive. Once we remove all of that, we can consider the file system to be an “Object …

Post thumbnail of Manual, low-level recovery of deleted jpeg images
19 June 2009
Continue reading Manual, low-level recovery of deleted jpeg images

Manual, low-level recovery of deleted jpeg images

I have an old 128 meg thumbdrive I haven’t used in years. It had pictures on it once, but they were deleted a long time ago. I want to recover whatever images are still on the disk that didn’t get written over. … JPEG-JFIF is “ffd8 ffe0″, while JPEG-DCF, which is what cameras will spit out onto their media cards, will be “ffd8 ffe1″.

Post thumbnail of Add “Open terminal here” right-click option to Nautilus
9 April 2009
Continue reading Add “Open terminal here” right-click option to Nautilus
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