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Linux

Application optimization with compilers for Linux on POWER

Post date: May 23, 2005, 16:05 Category: Optimizing Views: 2763 Comments
Tutorial quote: The Linux on POWER platform offers more than one option to produce binary C/C++ code. In addition to supporting both 32- and 64-bit runtime environments simultaneously, Linux on POWER has two compiler collections. The GNU Compiler Collection, or GCC, is consistent with other Linux implementations with specific exceptions for the POWER architecture. GCC is the leading compiler for portability but also features a number of performance enhancements for optimizing code. The IBM XL C/C++ compiler for Linux on POWER is derived from the high performance compiler for AIX but uses the GNU linker and assembler to create ELF objects that are fully compatible with objects produced by GCC. This document provides side-by-side comparisons of how these two compilers are controlled, overviews of what the compilers are capable of, in terms of optimization, and tips for writing code that is more easily optimized with either of these compilers.
Unix+clones

Performance Tuning with GCC, Part 1

Post date: November 26, 2005, 01:11 Category: Optimizing Views: 3679 Comments
Tutorial quote: This article provides an overview of the different flags controlling optimization in GCC and some hints on how to use them to get the most performance out of your application. In particular, it discusses some of the new optimization features of the GCC 4.x series included in Fedora™ Core 4 and the upcoming Red Hat® Enterprise Linux® versions.
Ubuntu

How to Install C and C++ Compilers in Ubuntu and testing first C and C++ Program

Post date: May 4, 2008, 23:05 Category: Software Views: 11200 Comments
Tutorial quote: If you are a developer you need C and C++ Compiler for your development work on your ubuntu system this tutorial will explain howto install C and C++ Compilers in Ubuntu with program examples.In ubuntu you can install the build-essential for C and C++ compilers.

Unix+clones

Writing Shell Scripts

Post date: April 13, 2005, 02:04 Category: Programming Views: 3782 Comments
Tutorial quote: With the thousands of commands available for the command line user, how can you remember them all? The answer is, you don't. The real power of the computer is its ability to do the work for you. To get it to do that, we use the power of the shell to automate things. We write scripts.
Fedora

Watching Your Power Consumption With Powertop On Fedora 7

Post date: October 1, 2007, 10:10 Category: Miscellaneous Views: 2977 Comments
Tutorial quote: Powertop is a command-line tool released by Intel that shows you the power consumption of the applications running on your system. It works best on notebooks with Intel mobile processors and can help you find out the programs that put a strain on your notebook battery. It requires kernel 2.6.21 or newer with tickless idle enabled (CONFIG_NO_HZ) (which is currently available for 32-bit kernels only). Fedora 7 comes with a 2.6.21 kernel by default, so we can use Powertop on it.
Linux

Automating Builds on Linux

Post date: April 13, 2005, 00:04 Category: Miscellaneous Views: 2582 Comments
Tutorial quote: An automated nightly build is a process for building an application every night using an infrastructure that automatically executes the required steps at the scheduled time, without any human intervention. A well-planned build process not only builds your application, but also provides you and your team with early detection of incompatible changes in the application components and early detection of errors introduced by newly integrated code. When configured and used properly, automated builds are a critical component for ensuring that the application satisfies quality requirements and continues to run as expected.
Linux

How To Set Up A Facebook RSS Feed Reader Application For Your Blog

Post date: September 2, 2007, 23:09 Category: Programming Views: 5434 Comments
Tutorial quote: This guide shows how you can build an RSS feed reader application for the social network Facebook that will display your blog's/web site's RSS feed on the profile pages of Facebook users (that have installed the RSS feed reader application). Each item of the RSS feed will have a Share button so that people can share the story with their friends, and the application will have an Invite link so that people can invite up to ten friends at once to also install this feed reader application. I will use PHP5 to build the RSS feed reader application. To parse the RSS feed and generate HTML from it, I will use Magpie RSS.
Fedora+Core

Building a Linux cluster on a budget

Post date: November 18, 2005, 19:11 Category: Network Views: 3985 Comments
Tutorial quote: So you need a lot of computing power but don't want to spend tens of thousands of dollars on a commercial cluster? Or maybe you just have a lot of machines sitting idle that you would like to put to good use? You can build a powerful and scalable Linux cluster using only free software and off-the-shelf components. Here's how.
Linux

Slim Down and Speed Up Linux

Post date: December 17, 2007, 06:12 Category: Optimizing Views: 7259 Comments
Tutorial quote: While Linux is pretty efficient with a computer's resources out of the box, there are still ways you can make it run leaner and meaner on your desktop. Using a little bit of know-how, a willingness to run a few terminal commands and a mind for efficiency, you can get every last bit of power from your Linux box, or get more life from an older system. Read on for a roundup of ways to slim down and speed up Linux that any level of user can implement.
Linux

Introducing Remo - An Easy Way to Secure an Insecure Online Application with ModSecurity

Post date: June 6, 2007, 23:06 Category: Security Views: 3249 Comments
Tutorial quote: Say you have a nasty application on your Apache webserver that has been installed by some people from the marketing department and you can neither remove nor patch it. Maybe it is a time problem, a lack of know-how, a lack of source-code, or possibly even political reasons. Consequently you need to protect it without touching it. There is ModSecurity, but they say this is only for experts. A straightforward alternative is Remo, a graphical rule editor for ModSecurity that comes with a whitelist approach. It has all you need to lock down the application.
Web-based applications and online marketing solutions - LumoLink