monline

(...) Modern Linux distro's, say Ubuntu (8.10) comes with a default PHP configuration of session.gc_probability = 0. This means that in general, session GC will never run(!). There is a unix cron job that runs every half hour and checks for old sessions to delete (see more at /etc/cron.d/php5) but this is done only if you're using the standard "files" as your session handler (check out the directive of session.save_handler on your machine to learn what php default sessions handler is but make sure to check that your application doesn't overwrite this), so for Drupal users using plain Debian/Ubuntu, stock LAMP packages and stock Drupal applications, this means that the PHP garbage collection, despite your best intentions, will also never run. (...)

It's quite easy actually. In MySQL you can disable all foreign key checks by setting the foreign_key_checks variable to zero.

A few additional links:

• How to add a new PPA source to your list of software repositories
• Firefox PPA
• Thunderbird PPA

BOM is nothing more than a nuisance. Detecting and removing it is plain simple. There's a utility called bomstrip that pretty much does what is says and there's the one-liner AWK implementation that you find on stackoverflow (I've added whitespaces for better readability):
Or a sed version (replaces in place):
To do this (or just simply detect BOM) recursively in a dir, you'll find tons of ideas in this other stackoverflow article.

"Most firewalls come pre-configured to quietly drop traffic rather than reject it. But what’s the difference between the two and is it truly better to drop instead of reject? If you have never given this question much thought, the answer might surprise you."
An interesting POV. I've been dropping packets all my life (just like 99% of firewall admins), but Chris's explanation makes sense. Some of his statements are trivially true, while others would need some investigation to prove or disprove.

In Internet Explorer 8 a new feature called Frame Process Merging was introduced. This means that if you open new tabs/windows (even if you try to start a new IE instance using the Quick Launch icon) only a new subprocess is created for the already running IE instance. This new process will share lots of resources with the main IE process, eg. session cookies. This prevents you from logging in to any website (web application) multiple times (potentially with different credentials) at the same time which can be pretty annoying if you're a developer. The problem is easy to fix: use the -noframemerging command line option of IE to disable this feature. You can create a separate IE shortcut with this option or just add it to the Quick Launch icon.

"After you move the Microsoft Windows XP system (boot) disk to a backup computer, you may receive the following Stop error when you try to start the Windows XP-based backup computer:

STOP: 0x0000007B (0xF741B84C,0xC0000034,0x00000000,0x00000000)
INACCESSIBLE_BOOT_DEVICE

The available methods are:

• To start up in 32-bit mode, press the keys "3" and "2" during boot. To start in 64-bit mode, press the keys "6" and "4" during boot.
• To make your system boot in a specific mode persistently, use one of these commands:
  
  sudo systemsetup -setkernelbootarchitecture x86_64
  or
  
  sudo systemsetup -setkernelbootarchitecture i386

I wonder how long will this keep working. There must be a reason for this being the only Fx extension (at least for now) that allows you to download FB albums. I guess FB changes way too fast for most 3rd party apps to keep up in the long term.

There're quite some. Here's a short list as a result of some googling:

• jffmpeg (an extension of JMF, last release in Jan 2006)
• FMJ and FFMPEG-Java (aka. Freedom for Media in Java, a more up-to-date alternative of JMF/jffmpeg, last release in Sep 2007)
• Xuggler (yet another Java lib for FFMPEG , last release in Feb 2010)
• JAVE (Java Audio Video Encoder, last release in Apr 2009)