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Tag: Leopard

Snow leopard + wordpress + latex problem

Ever since I’ve upgraded to Snow Leopard I’ve been having problems with the webserver.

At first there were the ‘obvious’ problems : mysql-connection lost and php-error message. These were swiftly dealt with using the excellent Snow Leopard, Apache, PHP, MySQL and WordPress! advice from ‘tady’.

Right now, access to this blog is extremely slow (and often impossible), certainly via the admin-page. The problem appears to be that most of my CPU is used by lots of pdfetex-processes owned by www. Hence the conjecture that it is a problem with either LaTeXRender or WP LaTeX.

Anyone experiencing a similar problem, or knowing a trick to resolve it? Takk.

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iTouch as network sniffer

In the iTouch warwalking post I was considering trying to gain access to closed networks for innocent purposes such as checking mail, rather than stealing secret passwords from people allowing you free access to their wireless network, but still, I should have thought of the following possibility

Here’s a walk-through :

  • type the following command into your iTouch (assuming you’ve installed the BSD subsystem) :

tcpdump -v -s 65535 -w log.txt

  • once you’ve collected enough packets, cancel the command (ctrl c), AFPd the file from the iTouch to your Mac and open it with Wireshark (this is the most convenient way to install binaries under Leopard as well as an updated version of X11. For other platforms, or source code, see here)

  • do whatever black magic you feel you have to perform using Wireshark (the new name for Ethereal) or other password crackers


overloaded iTouch

A jailbroken iTouch can do many wonderful tricks : by sarting up an AFDd server one can use it in Disk mode, exactly as an iPodClassic, one can use it as a WebServer by installing Apache and PHP and run a Wiki, one can install OpenSSH and secure shell to the rest of the world, one can even turn the iTouch into a music streamer via the FireFly server, one can …

And all of this on a gadget with only 116Mb RAM and one processor running at 412MHz… is asking for overload problems both on memory and battery. A couple of days ago I wanted to start up the iTouch and was greeted by a bright flickering screen and thought I’d finally bricked it…

Fortunately, there’s a simple lesson to be learned : with every new feature you install, learn how to switch if off and monitor your iTouch using the (under Utilities) which allows to view basic system info (screenshot below) as well as all active processes.

Here a few tricks to turn on/off the major consumers :

  1. To turn off the Apache-sever, ssh into the iTouch and give a apachectl stop command (you can always restart it with apachectl start.

  2. To control OpenSSH, install the (under Utilities) which allows to toggle Wifi, Edge, SSH and Bluetooth on or off (screenshot below).

  3. To control APFd, use its control pannel to toggle the Broadcast active feature only when you need your iTouch in Disk mode (it will then appear under Shared in your Finder window, at least under Leopard. For more on this see Mount and use your iPod touch as a Thumb Drive.

  4. To control FireFly, use the (under Multimedia) and scroll down (after staring for about 15 seconds to a white screen) to, tap it and start or stop the server.

Another major consumer is the (under Productivity). Maybe I should restrict my subscriptions to the hottest blogs only