How to convert / migrate image based vm (guest / dom-U) to LVM based vm (virtual machine)-(Guest / dom-U) using xen.
Posted July 2nd, 2009 by gnulinuxHi all, In this article we will learn how to install virtual machine on sparse file (image file) and how to migrate / move it to LVM based storage / disk. It is recommended to use LVM based partition to install virtual machines for productions environment, as you may experience performance issues if you use images (sparse files) to install virtual machine.
How to install virtual machine on image based disk ...
Install image based guest (sparse file). image-based-guest
Posted July 3rd, 2009 by gnulinuxHow to install virtual machine on image based disk ...
I will presume that you have a server running xend on it. In my case I am using CentOS 5.2 and xend 3.0.3. After your xen dom-0 server is ready we need to install dom-u on it. To install dom-u using sparse (image)file. please follow steps listed below.
How to create MySQL master-slave/master-slave chain.
Posted June 29th, 2009 by gnulinuxHi all, In this article I will explain how to create master-slave/master-slave chaing using mysql database server. As we know that complex data storage requirements are growing day-by-day and we need to make sure that information is available from multiple place to simplify access requirements. E.g Marketing department, billig and accoutns department, customer support etc might need to access data from database server while performing there day-to-day work. We can not rely on 1 database server for such scenario. In most of the cases most of them will need read-only copy of data.
Work faster on gnu/linux command line with this shortcuts.
Posted June 29th, 2009 by andyHi all. as a systems administrator or a normal user of gnu/linux, we always want some shortcuts to work quicker on your keyboard.
Here in this article I will show you some of the quick-shortcuts which will help you in your day-to-day work on gnulinux.
I assume you are on command line interface and if you press :
- Ctrl + a or Home key :-- with help of this your cursor will move to beginning of command line.
- Ctrl + e or End :-- Your cursor will move to the end of command line.
How to find GNU/Linux kernel version ?
Posted June 29th, 2009 by gnulinuxHi all, We know that in gnu/linux and most of all operating systems kernel is heart of Operatin Sytem. On all major linux distribution we can check linux kernel version with “uname” command.
In this article we will show you some commandline options [switches] which will be useful along with uname command. For knowing all kernel related info we can use uname -a. This command can be used on any gnu/linux.
on UBUNTU linux we can view content of file /etc/*release* to get information of installed operating system [OS] e.g.
Split large files in small chunks using "split" command
Posted June 26th, 2009 by andyHow to split big size files in small pieces in linux and unix?
I have seen sometimes while working on Linux and/or Unix system / server, we want to convert large files (big in size) into small chunks of files. Even sometimes a large file can take long time to open up. That can also increase load on server. Specially when a file is couple of GB in size and you want to debug something quickly in it, its better to split it in small chunks to speed up your work.
We can use readyily available “split” command in Linux or Unix.
Doing most of writting / editing / out of openoffice.org writter ....
Posted June 26th, 2009 by gnulinuxHi all, In this article I'll tell you about openoffice.org writter. It offers many great set of advanced features that can help you to create anything from a simple letter to a complex book size document / layout / journal etc. We need to offten dig deep in to any powerful application in order to get the most out of it. This article / document / tips will help you to quickly master Writer’s many useful features.
Removing a word from a user dictionary
To remove a word from a user-defined dictionary, follow these steps:
How to install PostgreSQL on Centos / Redhat/
Posted June 25th, 2009 by gnulinuxHi All, In this article I want to quickly show you specific steps to install PostgreSQL 8 database on CENTOS Linux 5. As we all know that we can use yum to install packages / softwares, I am using yum for this installation. To make sure that you have everything needed do:
#yum list | grep postgresql
Then verify that you see:
postgresql.i386, postgresql-server.i386 and postgres-libs.i386. if you have 64 bit version then you will see x86_64.
Centos installation comes with postgresql-lib installed. If it is not installed then please follow:
How to install and use PostgreSQL.
Posted June 25th, 2009 by gnulinuxGetting started with PostgreSQL
Posted June 23rd, 2009 by gnulinuxPostgreSQL database server installation and configuration in debian
Introduction
PostgreSQL is a fully featured object-relational database management system. It supports a large part of the SQL standard and is designed to be extensible by users in many aspects. Some of the features are: ACID transactions, foreign keys, views, sequences, subqueries, triggers, user-defined types and functions, outer joins, multiversion concurrency control. Graphical user interfaces and bindings for many programming languages
are available as well.
Postgresql Database Installation in Debian