I thought this was funny:

Historical footnote: DDT was developed at MIT for the PDP-1 computer in 1961. At that time DDT stood for "DEC Debugging Tape". Since then, the idea of an on-line debugging program has propagated throughout the computer industry. DDT programs are now available for all DEC …

The MATLAB script below will export 10000 primes to a file named 'primes.txt':

x=primes(10000); % Insert your own value here
fopen('primes.txt','w+'); % Insert the file name heref
printf(ans, '%d\n',x); % Prints a new line between each prime (C-style formatting)
fclose all;

You can use the following SQL query to set the next value to be used by an auto-incrementing field in MySQL. Useful if you make a mistake and want to delete a value you just added without leaving a gap in the sequence numbers, or if you want to start …

This is a problem I used to have with Firefox updates failing when I was running as a Limited User in Windows XP.

Here are the steps to fix the problem:

1. Close all running instances of Firefox.
2. Open an Administrator command prompt by right-clicking on a Command Prompt icon, choose …

The following shows how to add a user to the "sudoers" file in Fedora 11 (and likely other versions of Fedora), allowing normal users to execute elevated commands with sudo ... instead of needing to switch to root (su -).

[greg@fedora ~]$ su -
[root@fedora ~]# chmod +w /etc/sudoers
[root@fedora ~]# echo …

To view all environment variables

set

To view a specific environment variable, use one of the following

set VARIABLE
echo %VARIABLE%

To set an environment variable

set VARIABLE=VAUE

Useful in my Digital Signal Processing class...

Source: Wikipedia - Euler's formula

Source: Wikipedia - Sinc function

To compress a folder of files into a single tar-zip file, use the command:

tar -czvf archive.tgz files/

To extract a tar-zip file into the current directory, use the command:

tar -xzvf archive.tgz

I don't remember where I first saw this, but you can use the "imagesize" parameter in Google Image Search to find pictures that fit your desktop perfectly. In my case I have two size-by-side 19" monitors (not widescreen). Therefore my total screen space is 2560 x 1024. A Google image …

After my computer restarted overnight I became curious as to what time it restarted (I had something running overnight and was upset that it didn't finish. A quick Google search revealed that there are several ways to reveal this information:

Uptime.exe Utility

Microsoft provides a small utility that determines …