Author Archive

Creating and restoring an image of hard disk with Clonezilla

Tuesday, September 29th, 2009

Clonezilla is an open source disk imaging, cloning and backup software. It supports ext2, ext3, ext4, reiserfs, xfs, jfs of GNU/Linux, FAT, NTFS of MS Windows, and HFS+ of Mac OS. You can use it to clone single or multiple machines. It is more feature-rich than commercial Norton Ghost. In this video tutorial, I will [...]

Explore domain name resolution tools in Linux

Monday, September 28th, 2009

Often times, we are faced with issues pertaining to DNS name resolutions. In this series of articles, I will explore different tools available in Linux that can help in DNS name resolutions. First we will look at the utility called host

How to install Perl Module using CPAN

Friday, September 25th, 2009

At times, we need to install Perl modules that are not found in the official repository of a distribution. In that case, we have to revert to using cpan. CPAN stands for Comprehensive Perl Archive Network. It is an archive of over 16,000 modules of software written in Perl, as well as documentation for it. [...]

Configuring Postfix and dovecot POP3 and IMAP on Red Hat or Centos using local system accounts

Friday, September 25th, 2009

Postfix is one of the most widely deployed mail servers. In this tutorial, I will first show you how to configure Postfix for local system accounts and then I will describe how to configure Dovecot for POP and IMAP servers so remote users can retrieve their emails using email clients like Mozilla Thunderbird, Evolution or [...]

Manipulating, converting and editing audio and video

Thursday, September 24th, 2009

In this tutorial, we will see how to get information about audio or video file, convert from one audio or video format to another, capture audio or video from a device, capture screen and extracting audio or video from a multimedia file using ffmpeg.

Installing and configuring BIND9 DNS server

Tuesday, September 22nd, 2009

This video tutorial will show how to install and configure BIND9 DNS server on Red Hat 5, Centos 5 , Fedora or one of their derivatives. Checkout the text version of this tutorial. The tutorial was specifically written for Red Hat, Centos, Fedora and derivatives but it can be used for any Linux distributions.

Automating rsnapshot backups

Tuesday, September 22nd, 2009

In my earlier tutorial, I showed you how to do manual backup with rsnapshot. You should have completely followed that tutorial before continuing on with this one. In this how-to I will describe how to automate rsnapshot backups

Resetting Linux root password on Ubuntu

Thursday, September 17th, 2009

In my earleir article Resetting Linux root password on Centos/Red Hat, I showed you how to reset forgotten root password on Red hat and Centos. That method can be used for Ubuntu too but

Postfix send-only configuration for non-local domains

Thursday, September 17th, 2009

Sometimes, we need to configure our mail server so that it only sends emails and not receive them which avoids opening port 25 for smtp. In this tutorial, I will show a very simple way to set up Postfix so it send emails out to external domains only and not receive any emails from outside.

Installing Debian 5

Tuesday, September 15th, 2009

This video tutorial show you how to install Debian 5.0 aka Lenny from netinst CD from downloading ISO image to final x window installation.Debian is a rock solid distribution whose philosophy is true free software. Lenny is the latest stable version available for . First download the netinst CD from http://cdimage.debian.org/debian-cd/5.0.3/i386/iso-cd/debian-503-i386-netinst.iso and the burn it to a CD.