Linux Desktop Hacks

Scan for Wireless Networks #66

Chapter 8, Desktop Programs

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HACK

and create a thumbnail. Then it connects to the web server and changes to a

directory visible on the Internet. Once the script has completed, it deletes

any old screenshots and thumbnails and uploads the new ones. After it com-

pletes this job, it sleeps for 60 seconds by default (this is adjustable) and

then continues the loop once again.

Running the Code

To run the script first change the directory to $localfolder. Your

autoscreenshot.pl script should be sitting in this folder. Now you can run it

in two different ways. You can run the script independently with the follow-

ing commands:

foo@bar:~$ chmod 777 autoscreenshot.pl

foo@bar:~$ ./autoscreenshot.pl

An alternative is to run it with the Perl interpreter:

foo@bar:~$ perl autoscreenshot.pl

—John Cheng

HACK

#66

Scan for Wireless Networks Hack #66

Detect which networks are available in your area.

Wireless networks are rapidly gaining use in homes, businesses, schools,

and other places. You can often access these networks for your personal use.

As an example, if you are visiting a conference and a number of different

wireless networks are available, you need to be able to distinguish one net-

work from another and log on. To discover which networks are available to

you, you need to use a network scanner.

Another reason to scan a network is to determine how wide-reaching and

secure the