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migrating a system to a new disk

Posted 05-18-2011 at 06:16 AM by neonsignal
Updated 05-18-2011 at 06:18 AM by neonsignal

This is a procedure for migrating a whole system to a new disk (such as when upgrading the primary disk in a machine). The new disk is installed alongside the old one (either in a spare ATA port, or using a USB adapter).

First partition the new disk (the examples here assume the original disk is sda and the new disk is sdb):
fdisk /dev/sdb
Assuming all of the system is to be in a single partition, make a primary partition 'n', 'p', taking most...
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Simulating the "Monty Hall Problem"

Posted 05-18-2011 at 05:43 AM by D1ver
Updated 05-26-2011 at 09:20 PM by D1ver

I was reading about the "Monty Hall Problem" this afternoon and in an attempt to simulate it I wrote some code. The following should run in Matlab / GNU Octave. Results agree with the theory.
%	Code to simulate the monty hall problem
%	The array 'doors' represent the 3 doors
%	Door States:
%	0 - uninitialized
%	1 - car
%	2 - goat
%	3 - revealed
%	Neil Dick

% clear everything..
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upgrading ext3 to ext4 filesystem

Posted 05-18-2011 at 05:40 AM by neonsignal
Updated 05-18-2011 at 05:44 AM by neonsignal

The following commands upgrade an existing umounted ext3 filesystem to ext4 without having to reformat:
tune2fs -O extents,uninit_bg,dir_index /dev/partition
e2fsck -fDC0 /dev/partition
To upgrade the root partition, change /etc/fstab so that it will be mounted as ext4 (since ext4 can mount an ext3 file system), then reboot as single user read-only (recovery mode). Then after setting the tune2fs parameters, reboot again before running e2fsck. Then reboot...
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Posted 05-17-2011 at 10:10 AM by peonuser
Updated 05-17-2011 at 10:11 AM by peonuser

Wonder what Apple will come out with this weekend that linux has been doing for years.

Tested the motors from what I got at Goodwill. They work. I did not test the rc receivers from two of them. Need to start doing research. Pulled a couple of motors from some old old cdrom. Tested them and they work. They are going into a toy for an xmas gift.

Bought an adult bike from Goodwill for 5 dollars. Have a lot of work to do in it, but looks like it will be fine. Have to adapt...
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Any open t-shirt designers?

Posted 05-16-2011 at 12:30 PM by williamfromtexas

The joint KDE and GNOME Desktop Summit will be held in Berlin 2011 this year.

That being said, they're running competition for t-shirt designs for the event! It's a good opportunity to stick your graphic idea onto 1200 global desktop nerds.

You'll need to state that the designs are your own and available under the Creative Commons Attribution Share Alike 3.0 Unported license. Send to entries to:
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