Jailbreak

Here are a Daren wrote jailbreak blog:
http://hi.baidu.com/folk113/blog/item/4167f9ddd80da578d1164ea6.html
In which he mentions:

(2) binary patch
# This script
build script on your desktopcd ~ / Desktop
vim script
# (Xcode 4.1 execution), enter the following in the editor
#! / Bin / bash
cd / Developer / Platforms / iPhoneOS.platform / Developer / Library / Xcode / Plug-ins / iPhoneOS \ Build \ System \ Support.xcplugin / Contents / MacOS /
dd if = iPhoneOS \ Build \ System \ Support of = working bs = 500 count = 255
printf "xc3x26x00x00" >> working
/ Bin / mv-n iPhoneOS \ Build \ System \ Support iPhoneOS \ Build \ System \ Support.original
/ Bin / mv working iPhoneOS \ Build \ System \ Support
chmod a + x iPhoneOS \ Build \ System \ Support

Save and exit
This script execute permissions granted and execute it
chmod 777 script
. / Script

This step is to understand how to operate with, I wonder whether there are other methods of operation?
Solving jailbreak Daren ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
Reply:
Super reach people in there?
Reply:
!!!!!!?????? Joy of exploration, the exploration of less than one disappointed ah ~ ~ ~ ~ ~ ~