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Block crackers with 3 locks to your SSH door
Security always requires a multi-layered scheme. SSH is a good example of this. Methods range from simple sshd configuration through the use of PAM to specify who can use SSH, to application of port-knocking techniques, or to hide the fact that SSH access even exists. Applying these techniques can make life much harder for possible intruders, who will have to go past three unusual barriers.
"Learn 3 ways of hardening SSH access to your system to block would-be crackers"

( Permalink: Block crackers with 3 locks to your SSH door      Submitted by Noel Mon Oct 18, 2010 )

Bazaar: source control system
Bazaar is used to produce the Ubuntu Linux distribution, which is an enormous software project with thousands of components. If you're using a UNIX or Linux system, chances are that your distribution offers a pre-built Bazaar package. Bazaar is flexible enough to accommodate Subversion - a centralized system and Git - a decentralized system. This article introduces you to Bazaar's many appealing features.
"Intro to Bazaar, a great place to keep your code"

( Permalink: Bazaar: source control system      Submitted by Noel Fri Oct 15, 2010 )

User space memory access from the Linux kernel
As the kernel and user space exist in different virtual address spaces, there are special considerations for moving data between them. Explore the ideas behind virtual address spaces and the kernel APIs for data movement to and from user space, and learn some of the other mapping techniques used to map memory.
"An introduction to Linux memory and user space APIs"

( Permalink: User space memory access from the Linux kernel      Submitted by Noel Wed Oct 13, 2010 )

Techniques for migrating Perl to Python
Python programmers shouldn't get too smug. While many people agree that Python is designed in a way that makes it a highly readable language, there can still be problems with legacy, untested Python code too. Porting legacy Perl to Python can be a daunting task. In this article, learn some of the theory behind dealing with legacy code, including what not to do.
"Techniques for migrating legacy, untested Perl to Python"

( Permalink: Techniques for migrating Perl to Python      Submitted by Noel Mon Oct 11, 2010 )

New AIX 7 capabilities for virtualization
The IBM AIX operating system provides a highly scalable IT infrastructure for client workloads. Learn about the latest version, AIX 7.1, an open standards-based UNIX operating system, that includes significant new capabilities for virtualization, security features, availability features, and manageability.
"Learn about the latest version of AIX 7.1 - an open standards-based UNIX operating system"

( Permalink: New AIX 7 capabilities for virtualization      Submitted by Noel Fri Oct 8, 2010 )

Introduction to PowerHA
PowerHA for AIX is the new name for HACMP (High Availability Cluster Multiprocessing). HACMP is an application that makes system fault resilient and reduces downtime of applications. This article introduces PowerHA and provides a detailed explanation of how to configure a two node cluster. This document is very useful for understanding PowerHA and setting up a two node cluster.
"Get Power high availability by Configuring a PowerHA cluster"
Introduction to PowerHA

( Permalink: Introduction to PowerHA      Submitted by Noel Wed Sep 1, 2010 )

Yeah - Learn Linux: Maintain the integrity of file
Learn how to check the integrity of your Linux filesystems, monitor free space, and fix simple problems. Use the material in this article to study for the Linux Professional Institute (LPI) 101 exam for Linux system administrator certification or just to check your filesystems and keep them in good working order, especially after a system crash or power loss. Today's world relies heavily on technology, and at times technology can fail us. That is why, unlike traditional methods of storage such as office cabinets, it would be necessary to back up your electronic file systems.
"Here's an easy way to keeping track of your Linux disk space"
Yeah - Learn Linux: Maintain the integrity of filesystems

( Permalink: Yeah - Learn Linux: Maintain the integrity of file      Submitted by Noel Mon Aug 30, 2010 )

Live Kernel Patches with Ksplice
Ksplice applies kernel patches on-the-fly - no reboot required in a fraction of a second. Here's a hands-on guide to performing painless system updates. Learn how to patch a live kernel and give reboots the boot.
"Avoid reboots of your system with live Kernel updates using Ksplice"
Live Kernel Patches with Ksplice

( Permalink: Live Kernel Patches with Ksplice      Submitted by Noel Wed Aug 11, 2010 )

vi tips and tricks: Ten cool commands
Amaze your friends with cool vi tips and tricks that will improve the efficiency of your file editing. This article takes you through ten of the less well-known vi commands that should form part of any serious vi user's toolkit.
"Become a vi editing wizard with these 10 tips"
vi tips and tricks: Ten cool commands

( Permalink: vi tips and tricks: Ten cool commands      Submitted by Noel Mon Aug 2, 2010 )

Understanding ZFS & ZFS ARC/L2ARC
Great article describing level one and two memory caching in zfs.
"L2ARC is a new layer between Disk and the cache (ARC) in main memory for ZFS. It uses dedicated storage devices to hold cached data. The main role of this cache is to boost the performance of random read workloads. The intended L2ARC devices include 10K/15K RPM disks like short-stroked disks, solid state disks (SSD), and other media with substantially faster read latency than disk."
Understanding ZFS & ZFS ARC/L2ARC

( Permalink: Understanding ZFS & ZFS ARC/L2ARC      Submitted by Noel Mon Jul 26, 2010 )

Creates a whole new painting tool for GIMP
The GNU Image Manipulation Program (GIMP) is a robust application for editing and manipulating digital images. In this article, you will learn how to get started with the GIMP code, how to build the project from the Git repositories, and how to find your way around the code tree. And you will build an example application that creates a whole new painting tool for the program.
"Dive into the code base of the GNU Image Manipulation Program and add to it"

( Permalink: Creates a whole new painting tool for GIMP      Submitted by Noel Fri Jul 23, 2010 )

Gourmet Java technology for Android applications
Java language is the tool of choice for Android developers. The Android runtime uses its own virtual machine, Dalvik, which is not the usual Java virtual machine that most Java developers are used to. In this article you will learn advanced Java features and how they are implemented on Android. This includes features such as concurrency, networking, and database access.
" Implement concurrency, networking, and database access in Android"
http://www.ibm.com/developerworks/library/x-gourmetandroid/index.html?ca=dgr-lnxw01DalvikJavadth-JV

( Permalink: Gourmet Java technology for Android applications      Submitted by Noel Wed Jul 21, 2010 )

More powerful Python testing techniques
Look at how the leading Python testing frameworks provide robust auto-discovery of your application tests. Make sure your applications are written right the first time, and that they stay working through months and years of further tweaks and improvements.

( Permalink: More powerful Python testing techniques      Submitted by Anonymous Tue Jul 20, 2010 )

Distributed data processing with Hadoop
In Part 1 learn to Install and configure a simple cluster and discover ways to monitor and manage Hadoop using its core Web interfaces. In Part 2 Install configure a multinode cluster and dig into the management aspects of Hadoop.
"How to use Hadoop in a single-node and multinode cluster"
http://www.ibm.com/developerworks/linux/library/l-hadoop-1/index.html?ca=dgr-lnxw01HadoopP1dth-LX

( Permalink: Distributed data processing with Hadoop      Submitted by Noel Mon Jul 19, 2010 )

Creating mobile Web applications with HTML5
In this five-part series, you will take a closer look at several new technologies that are part of HTML5, that can have a huge impact on mobile Web application development.
  • Part 1: Combine HTML5, geolocation APIs, and Web services to create mobile mashups
  • Part 2: Unlock local storage for mobile Web applications with HTML5
  • Part 3: Make mobile Web applications work offline with HTML5
  • Part 4: Using Web Workers to speed up your mobile Web applications
  • Part 5: Develop new visual UI features in HTML 5
"HTML 5 is a very hyped technology, but with good reason. It promises to be a technological tipping point for bringing desktop application capabilities to the browser"

( Permalink: Creating mobile Web applications with HTML5      Submitted by Noel Thu Jul 15, 2010 )

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