Regular expressions are seriously powerful tools, but most folks without serious IT experience aren't familiar with them. A helpful blog post details eight useful expressions and how they work.
If you're a regular Lifehacker reader, you've probably seen regular expressions mentioned as a supported feature of software, such as the Automatic Save Folder Firefox add-on or Everything for Windows. The Nettuts+ blog guides beginners through what regular expressions are, how they all work (reading backwards and forwards at the same time is a little mind trip, just for starters), and how you could use them to find files, passwords, text or other important things on your system.
Got your own ways of creating or understanding regular expressions? Tell us about them in the comments.
8 Regular Expressions You Should Know [Nettuts+]