Advanced Bash-Scripting Guide
„This tutorial assumes no previous knowledge of scripting or programming, but progresses rapidly toward an intermediate/advanced level of instruction . . . all the while sneaking in little snippets of UNIX
ONLamp.com: Whats New in ModSecurity
„ModSecurity 1.9 was released in early November 2005, more than a year after the previous stable release, version 1.8. The delay between the two releases was much longer than I had anticipated. Looking back, I really should have released 1.9 back in April, but it so happened that I skipped that release and continued adding new features. This resulted in a release that contains double the features and more than a 40 percent increase of the source code size.
This article describes the most important new features in ModSecurity 1.9. This is somewhat difficult to do, because there are so many of them, but I have decided to group the enhancements into three major areas:
Rule engine enhancements
Real-time audit log aggregation
Stateful request monitoring“
How to use sed
„Introduction to Sed
How to use sed, a special editor for modifying files automatically. If you want to write a program to make changes in a file, sed is the tool to use.
There are a few programs that are the real workhorse in the Unix toolbox. These programs are simple to use for simple applications, yet have a rich set of commands for performing complex actions. Don’t let the complex potential of a program keep you from making use of the simpler aspects. This chapter, like all of the rest, start with the simple concepts and introduces the advanced topics later on.
A note on comments. When I first wrote this, most versions of sed did not allow you to place comments inside the script. Lines starting with the ‚#‘ characters are comments. Newer versions of sed may support comments at the end of the line as well. „
Using the sed Editor
„Using the sed Editor
The sed editor is among the most useful assets in the Linux sysadmin’s toolbox,
so it pays to understand its applications thoroughly
One of the best things about the Linux operating system is that it is crammed full of utilities. There are so many different utilities, in fact, that it is next to impossible to know and understand all of them. One utility that can simplify life in key situations is sed. It is one of the most powerful tools in any administrator’s toolkit and can prove itself invaluable in a crunch. „
XML.com: Tuning AJAX
„Unless you live under a rock, you’ve heard about and likely even used AJAX. Asynchronous JavaScript and XML is becoming an increasingly pervasive deployment methodology, which necessitates that people start to both understand how it works and actually consider it more seriously as an enterprise-level development tool. To that end, I will try to illustrate one method of benchmarking your AJAX applications as well as point out some of the major performance pitfalls I have encountered while developing AJAX components and applications.“