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LINUX ADMINISTRATION NOTES & CODE SNIPPETS

Reprogram keyboard keys with xmodmap

If you do not like your keyboard layout or the layout you are using is very close to perfection but some keys could be re-mapped to different location there is ...

Sunday, 21 March 2010

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Synchronization of your camera with PC using rsync

rsync can be used in many ways. This small utility got its name from Remote Synchronization words. However the word remote does no have to be a remote location over ...

Sunday, 21 March 2010

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xine was unable to initialize audio drivers

xine was unable to initialize audio drivers error message is an issue which bothers me for long time alredy. I have a feeling that it is not related to only ...

Saturday, 20 March 2010

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Frequently used options for debian / ubuntu dpkg command

dpkg -l List all installed packages.EXAMPLES:dpkg returns a number of installed packages:$ dpkg -l | wc -l1209ask dpkg to return only packages related to php. This will include installed and non-installed ...

Saturday, 20 March 2010

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Resize an image with OpenCV cvResize function

This is a small code to resize an image to a desired percentage from an original. New size of width and height are calculated from a percentage supplied as a ...

Thursday, 18 March 2010

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Display Image Attributes with OpenCV

Here is a simple program to display image attributes like width, height, size and etc. This program assumes that you have OpenCV library alredy installed on you system. #include <iostream> #include <iomanip> #include ...

Thursday, 18 March 2010

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C++ function to calculate Fibonacci number

Here is a small program to clalculate Fibonacci numbers using c++ language. No tampering with the code needed ( only iprovements ! ) just copy and compile with g++ FibonacciNumber.cpp ...

Thursday, 18 March 2010

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Google offers free Mysql database

Search engine is very powerful tool but not just for search but also for beginner hacking. Some mysqladmin web tools are indexed with google which make them available for search. ...

Thursday, 18 March 2010

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More in: LINUX ADMINISTRATION NOTES & CODE SNIPPETS

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Linux News

Victoria expands Linux e-voting rollout

Victoria’s Electoral Commission has flagged plans to expand its use of electronic voting kiosks based on Linux software in the next state election in November this year. The state first ...

Sunday, 21 March 2010

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Ten Years of OpenOffice.org

This year (2010) marks the 10th anniversary of a lot of things: Tuvalu’s entry into the United Nations, Israel’s withdrawal from Lebanon, and the debut of Windows ME, for example. ...

Saturday, 20 March 2010

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Symbian Foundation Builds Cloud Platform on Red Hat Enterprise Linux

Red Hat, Inc., the world's leading provider of open source solutions, today announced that the Symbian Foundation, a global non-profit organization formed to foster an open source community around its ...

Tuesday, 16 March 2010

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Try the Linux desktop of the future

For the tinkerers and testers, 2010 is shaping up to be a perfect year. Almost every desktop and application we can think of is going to have a major release, ...

Sunday, 7 March 2010

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I-O Data Signs Linux Software Patent Agreement With Microsoft

Microsoft Corp. and I-O Data Device Inc. have entered into an agreement that will provide I-O Data’s customers with patent coverage for their use of I-O Data’s products running Linux ...

Friday, 5 March 2010

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Microsoft and Amazon.com Sign Patent Agreement

Microsoft Corp. today announced that it has signed a patent cross-license agreement with Amazon.com Inc. The agreement provides each company with access to the other’s patent portfolio and covers a ...

Friday, 5 March 2010

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When will Microsoft sue Google over Linux?

Microsoft once made the mistake of broad-brushing Linux as an intellectual property quagmire. It made Microsoft headlines, but few friends: lawyers didn't believe it, customers didn't want to hear it, ...

Monday, 1 March 2010

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Amazon Ponies Up to Microsoft for Linux Rights

Microsoft and Amazon have entered into a patent cross-licensing deal that covers, among other things, Amazon's Kindle and its use of Linux-based servers. The agreement calls for Amazon to pay ...

Tuesday, 23 February 2010

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Google's Android code deleted from Linux kernel

After removing Google's Android driver code from the Linux kernel, Novell Fellow and Linux developer Greg Kroah-Hartman has argued that the mobile OS is incompatible with the project's main tree. ...

Friday, 5 February 2010

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Sold out: Microsoft's Linux business is booming

The SD Times reports that Microsoft has sold nearly all of its SUSE Linux Enterprise Server (SLES) support coupons. Microsoft purchased the $240 million worth of coupons from Novell as ...

Friday, 5 February 2010

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Symbian OS Takes on Android, Linux in Massive Open Source Move

In a dramatic strategic move, the Symbian Foundation has made source code for the world’s most widely used mobile OS completely free and completely open. In addition, the Foundation says ...

Friday, 5 February 2010

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Ubuntu Firefox shuns Google for Yahoo! search

The next release of Ubuntu will scrap Google as the default search engine on its Firefox browser in favor of Yahoo!, thanks to a new revenue-sharing deal between Yahoo! and ...

Thursday, 28 January 2010

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2009's Five Most Popular & Important Linux Stories

Before jumping into this, let me say that's what popular isn't the same thing as what's important. So, I'm giving you a twofer list. The first is the most popular ...

Tuesday, 5 January 2010

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Shuttleworth steps down as Ubuntu 10.04 alpha steps up

Canonical announced that Mark Shuttleworth will be stepping down as CEO in March to be replaced by Canonical COO Jane Silber, reports eWEEK. Meanwhile, the Ubuntu project has released its ...

Friday, 18 December 2009

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Microsoft/Linux Milestones

Microsoft Monday made an historic move by submitting device drivers to the Linux kernel under a GPLv2 license. Microsoft has had a checkered past with both Linux and its open ...

Tuesday, 15 December 2009

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More in: Linux News

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Linuxconfig.org
Linux lvm - Logical Volume Manager

This article describes a basic logic behind a Linux logical volume manager by showing real examples of configuration and usage. Although Debian Linux will be used for this tutorial, you can also apply the same command line syntax with other Linux distributions such as Red Hat, Mandriva, SuSe Linux and others.

This is what we are going to do

Logical Volume Manager

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Howto CREATE BUNDLE UPLOAD and ACCESS custom Debian AMI using ubuntu

Author: Lubos Rendek


Introduction

This guide will provide all necessary steps on how to create, bundle, upload, run and connect Debian ETCH AMI on Amazon Elastic Compute Cloud (Amazon EC2). For this guide we have used a Ubuntu 9.04. However, any other Linux distribution can also be used as long as it contains java and ruby packages. For more information about Amazon EC2 read  here.

This page is not in any way an affiliate to Amazon Web Services. !

Prerequisites

  • Internet connection
  • registered user account for S3 and EC2 services with Amazon Web Services (AWS) 
  • Amazaon Access Key ID
  • Amazon Secret Access Key
  • Amazon Account Number
  • Amazon X.509 Certificate
  • at least 1GB free hard drive space
  • following packages need to be installed:
apt-get install ssh debootstrap ruby 
sun-java6-bin libopenssl-ruby curl

Before we start



 As you will see in the next sections of this guide many different files are required to successfully use Amazon's EC2 Web Services. For the sake of simplicity, we will create a directory "aws" in ~/ and store all necessary files there for a quick access. There will be three exceptions:

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Filesystem Basics

This article explains basic commands for navigation within Linux file system. The diagram below represents (part of) a Linux file system know as Filesystem Hierarchy Standard. A line from one node to a node on its right indicates containment. For example, the student directory is contained within the home directory.

FileSystem Hierarchy Standard direcotry tree

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Recover - Reset forgotten linux root password

Introduction

 

This method of reseting/recovering of lost Linux root password should work on most of linux distributions. I have tested this method for couple years already, starting with debian woody trough redhat and suse to ubuntu hardy.

If you run lilo boot loader instead of grub you can use the same method but with some modifications on how to edit lilo boot prompt.

Edit Grub boot menu options

First you need to get into grub menu options. This menu is displayed right at the beginning of the boot. If you cannot see your grub menu options press "ESC' key.

 

You should get something similar to this:

grub boot menu

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