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On this page a Python script is referenced which discovers available WLANs and finds the optimal channel to use for your WLAN. You can download it here .
 
Other tools to get information about WLANs:
inssid
 
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This sample code scrambles words in text and you still can read the text. Amazing.
Rules:
1) Don't scramble a word with less than 4 characters
2) Keep the first and last character of the word and scramble the rest   
 
Invoke cgi script => Scramble words (Doesn't work any more because my new provider doesn't offer cgi). As an alternatice you can call the Implementation in Javascript).
Script as pure Python script  => Download
 
The same algorithm I implemented on this page together with the source code in Javascript.

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Python allows to bundle a lot of Python files with py2exe in one executable for Windows. That way a simple call of this exe allows to start the Python program. No installation is required. I don't like windows and use Linux instead. That's why I had to search for a similar solution on Linux. I just want to have all my Python code bundled in one shell script and to be able to distribute one bash file only instead of the whole set of python files.
 

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I just stumbled upon a very nice and detailed article, which explains bash redirections very detailed. When you finish reading the article you know everything about redirections. This article is one of a sequence of five 'bash one-liners' articles - Working with files, working with strings, working with history and navigating around, which are also very interesting and helpful.