Does Linux Certification cut the mustard?

Wednesday, 10 August 2011 19:49

For those pursuing a Linux career, is Linux certification a must have or an indication that you lack the real world experience that employers demand? 

In the ever fast-paced and dynamic context of information technology, IT professionals need to be on their toes, constantly staying abreast of changes in the technology platforms on which they work. Operating systems are refined and improved in newer versions of technology, mandating systems administrators to constantly be on a learning curve to keep up with the changes.

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What is DHCP and how to configure DHCP server in Linux

Thursday, 04 August 2011 20:02

Anyone with a basic knowledge of computer networking knows that in order for two hosts communicate on the same network using TCP/IP model, both hosts need to have an unique IP address. There are two ways on how a network host can obtain an IP address. 

One way is to manually configure network interface and assign an IP address by hand. This is called static configuration which means that host's IP address will never change until changed manually again by user or system administrator. If company's network includes more than 1000 hosts this job of setting up each individual host with static IP address will become tiresome and more importantly inefficient.

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Linux job portal launched: LinuxCareer.com

Last Updated on Thursday, 11 August 2011 22:09 Tuesday, 17 May 2011 21:03

As a demand for Linux-related jobs has jumped unexpectedly high in the last couple of years, LinuxCareer.com as a new Linux related job portal attempts to compensate for this sudden surge in demand for Linux skilled professionals and will surely accommodate both employers and job seekers.  LinuxCareer.com is not affiliated with any local or international company, nor is it a recruitment or employment agency and it is specialising only in Linux based careers and closely related Information Technology fields.

LinuxCareer.com offers tools such as application tracking,  job alerts, login and syncing resumes with facebook.com and linkedin.com accounts as well as screening questionnaires for employers and resume uploads for job seekers.

Job seekers world wide can stay informed about new job listings using RSS feed or Twitter and search linuxcareer.com portal using their mobile by navigating to linuxcareer.com’s mobile version m.linuxcareer.com .

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Remove and add www from url using apache .htaccess file

Last Updated on Friday, 13 May 2011 16:15 Friday, 13 May 2011 15:02

Having www in URL of your webpages is not a necessary. It is matter of choice. Most of the internet users are still typing www in from of every domain they enter into they web browser. By use of apache's .htaccess file yuo can force your URL to contain www or you can remove www completely. Here is a way how to add www to your URL. Edit your .htaccess file:

Add www to URL

RewriteEngine On
RewriteCond %{HTTP_HOST} ^linuxconfig.org$
RewriteRule (.*) http://www.linuxconfig.org$1 [R=301]

Remove www from URL

RewriteEngine On
RewriteCond %{HTTP_HOST} ^www.linuxconfig.org$ [NC]
RewriteRule ^(.*)$ http://linuxconfig.org/$1 [R=301,L]

In both cases replace domain name with your website's domain name.

 

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Date manipulation with yest

Last Updated on Wednesday, 30 March 2011 07:08 Friday, 25 March 2011 20:21

yest is a great tool which allows user to do some complex date manipulations by employing ab easy to understand syntax. It is not a competitor to a date command, rather it is a handy tool which has some features you may not find in date command. Name of the yest command is derived from its default no argument output which is yesterday’s date.

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Bash script display usage and check user

Last Updated on Friday, 25 March 2011 11:54 Friday, 25 March 2011 11:28

Sometimes it is needed to check what user is executing the bash script and whether the user supplied all required arguments:

#!/bin/bash 
 
display_usage() { 
	echo "This script must be run with super-user privileges." 
	echo -e "\nUsage:\n$0 [arguments] \n" 
	} 

# if less than two arguments supplied, display usage 
	if [  $# -le 1 ] 
	then 
		display_usage
		exit 1
	fi 
 
# check whether user had supplied -h or --help . If yes display usage 
	if [[ ( $# == "--help") ||  $# == "-h" ]] 
	then 
		display_usage
		exit 0
	fi 
 
# display usage if the script is not run as root user 
	if [[ $USER != "root" ]]; then 
		echo "This script must be run as root!" 
		exit 1
	fi 
 
echo "All good !!!"

OUTPUT:

$ ./script.sh 1 
This script must be run with super-user privileges.

Usage: ./script.sh [arguments] 

$ su
Password: 
# ./script.sh 1 2
All good !!!

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Automatic HTML form submission using WWW::Mechanize

Last Updated on Wednesday, 23 March 2011 14:14 Wednesday, 23 March 2011 13:40

Here is a short tip on how to automatically submit a HTML form using a Linux command line and perl script. For this example we would need a WWW::Mechanize perl module and some basic PHP website. Let's start with simple PHP website. The website will consist of two files:

form.php:

<form action="submit.php" method="post">
First Name: <input name="fname" type="text" />
Last Name: <input name="lname" type="text" />
<input type="submit" />
</form>

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Debian apt-get wheezy sources.list

Last Updated on Saturday, 19 March 2011 11:21 Friday, 18 March 2011 22:50

Debian is the best Linux Operating System ever build, and I personally thank to all involved in its development !!!

Lubos

Security Updates

# /etc/apt/sources.list :
deb http://security.debian.org/ wheezy/updates main contrib non-free
deb-src http://security.debian.org/ wheezy/updates main contrib non-free

Australia Mirror

# /etc/apt/sources.list :
deb http://ftp.au.debian.org/debian/ wheezy main contrib non-free
deb-src http://ftp.au.debian.org/debian/ wheezy main contrib non-free

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