[Need Some help: Print every path to a tree]

How deep is your tree? The easy way to deal with trees is usually a recursive function, but you can hit stack problems with a deep tree.

[Wirelessly saving data to a hidden device]

What about (as suggested previously) a Fonera 2.0 but use the USB port to host a USB Flash Drive, or USB hard disk?

[Extending Wireless Router's Network Signal using WAP]

the easiest and more reliable way to 'extend a wireless network' is to plug an Ethernet cable in to a switch the existing wireless network is connected to, then plug another access point in to the other end of the cable. You have successfully extended the networks wireless coverage.

To avoid the hassle of running cables you can use Ethernet over Power modules. You can loose some of the bandwidth compared to dedicated cabling, but as long as you get good quality modules you shouldn't loose too much.

Other than the convenience of using Ethernet over Power you also get to avoid the argument with your other half about why you have spent the entire day ripping up carpets, fitting trunking or trailing cables over the house. In my experience this argument will normally start when you are drilling holes through walls to poke the cable through. And before you try it, the argument of "If you let me fit the false floor when we moved in, we wouldn't have had to do this." doesn't work it just makes the argument worse.

[Netbook setup]

I changed the memmory in my eee 900 (SSD not hard disk) for a 2GB module. They use standard laptop so-dimms and mine had a nice label on telling me the spec, which made it easy to make sure I got a matching spec for the upgrade.

If you are wanting to increase your wifi range with a USB dongle then make sure you get one with an external antenna (most with external antennas have it connect with a SMA type connector so you can add your own directional antennas for the extra bit of range) Also check out the chipset, and make sure that there are suitable drivers available for it. (By suitable I mean ones that will work with kismet, aircrack, etc.)

[Perl - Need the last 8 chars of a string]

One of perl's strengths is regular expressions.

This online tool is helpful is making your regex http://gskinner.com/RegExr/

In your case you would want something like:

if ($var = ~ gmi/complete/)

{print "complete found"}

Actually that wouldn't quite do what you want. For example it would match against $var if it contained "This is complete" but it would also match against $var if it contained "Complete this is not". He would actually want something like this to force the complete to be at the end of the line. Note that the [\r\n]* in the regular expression will make sure that there aren't any problems caused by carriage returns and new line characters.

if($var=~m/complete[\r\n]*$/i)
{
  print "Complete found at end of output";
}

[Hak5 Screensaver]

I like this, I have so many ideas for things like this but never get round to implementing any of them a competition would definitely push me into actually working on some of the ideas.

[Episode 5x16]

Great episode as always. The VM stuff is very timely as we are just looking at that now where I work (Xen rather than VM but the theory is pretty much the same).

Any chance of a link to the winning home LAN layout?

[Videos of Games you used to play *before* you were a teenager]

The game I played the most was Elite. Wireframe graphics have never been so addictive.

[IDS IPS - they exist but who really uses them ?]

I once had a call from the group responsible for keeping our networks secure saying that their snort had picked up some odd behavior from our subnet with one of our servers looking like it was running a ssh connection on port 80. Turns out that the web service running on that machine had handed out a sessionID which had an exact match for their signature for a ssh connection and so their IDS thought that webserver was running ssh on port 80. Took me ages of looking through logs to figure out what had happened to trigger the IDS.

[Hacking Movies! What's your favourite/ the best?]

I'm glad that I'm not the only one who enjoys takedown (Or was it called trackdown, or was it released under a different in title for different countries?).

The one key thing that stands out for me is that even with all the Hollywood spin that they put on it everyone who watches it ends up siding with Mitnick.