Easy Automated Snapshot-Style Backups with Rsync describes a method for generating automatic rotating "snapshot"-style backups on a Unix-based system, with specific examples drawn from the author's GNU/Linux experience. Snapshot backups are a feature of some high-end industrial file servers; they create the illusion of multiple, full backups per day without the space or processing overhead. All of the snapshots are read-only, and are accessible directly by users as special system directories. It is often possible to store several hours, days, and even weeks' worth of snapshots with slightly more than 2x storage. This method, while not as space-efficient as some of the proprietary technologies (which, using special copy-on-write filesystems, can operate on slightly more than 1x storage), makes use of only standard file utilities and the common rsync program, which is installed by default on most Linux distributions. Properly configured, the method can also protect against hard disk failure, root compromises, or even back up a network of heterogeneous desktops automatically.
Over the last several months, a small group of web developers and designers have been hard at work perfecting a method to insert rich typography into web pages without sacrificing accessibility, search engine friendliness, or markup semantics. The method has been dubbed sIFR (or Scalable Inman Flash Replacement). sIFR 2.0: Rich Accessible Typography for the Masses
The auther has created an awesome toolkit that lets you, without much fuss, embed flash movies -- as well as offer non-flash versions without sniffing. It works on the principle that most people who do NOT have Javascript also do NOT have flash.
Greylisting: The Next Step in the Spam Control War
Greylisting is a new method of blocking significant amounts of spam at the mailserver level,
but without resorting to heavyweight statistical analysis or other heuristical (and error-prone)
approaches. Consequently, implementations are fairly lightweight, and may even decrease network
traffic and processor load on your mailserver.
There are a few special URLs, which begin with about:, that you can type into the Location Bar: About protocol links - MozillaZine Knowledge Base