Install libQtCore and libQtGui first. Then,

On a 32-bit machine

rm -f /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtCore.so.4

rm -f /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtGui.so.4

ln -s /usr/lib/libQtCore.so.4 /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtCore.so.4

ln -s /usr/lib/libQtGui.so.4 /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtGui.so.4

On a 64-bit machine,

rm -f /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtCore.so.4

rm -f /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtGui.so.4

ln -s /usr/lib64/libQtCore.so.4 /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtCore.so.4

ln -s /usr/lib64/libQtGui.so.4 /usr/local/Wolfram/Mathematica/6.0/SystemFiles/Libraries/Linux/libQtGui.so.4

If you have just started using mathematica on Fedora x (> 4) and the first time you run it from the terminal and it crashes giving segmentation fault at the end, here is what you need to do. The problem arises because the location of Xlib folders are changed from what it was in previous versions.

• Login as root
  
• Make sure that libX11 is installed,
  rpm -q libX11
  
  If some version is installed, then proceed
  else install it

• mkdir /usr/X11R6/
  mkdir /usr/X11R6/lib/
  mkdir /usr/X11R6/lib/X11/
  cd /usr/X11R6/lib/X11/
  ln -s /usr/share/X11/XKeysymDB XKeysymDB
  ln -s /usr/share/X11/locale/ locale
  

Things should be fine now!

If you are getting the message "Problem with Audio Playback" while trying to make call with skype 2.0 on Linux, then you need to do the needful.

Go to - Options (By pressing Ctrl+O or by clicking Skype symbol on the bottom left and then clicking Options)

Then go to Sound devices and change Sound In and Sound options to pulse instead of Default device. Say apply and then close.

Things should be fine !

Joomla! is a great open source tool for making great websites with very little effort and absolutely no cost !

I wanted to host a website on my computer and I was really impressed with the features offered by Joomla! I found it to be a pain in the neck to install it on my Fedora 9 desktop though. So, I thought of writing a beginner's review of how to install Joomla! on a linux machine. The key steps in the installation are

1) Login as root

$ su -

2) Installing Apache server, MySQL server and php

$ yum -y install mysql mysql-libs php-mysql mysql-server php-cli php-common php-pdo php-mysql php-ldap httpd php

3) Configuring Apache server

Add following lines to /etc/httpd/conf/httpd.conf

#**********************************************
ServerName SERVERNAME
NameVirtualHost IP_ADDRESS


DocumentRoot PATH



DocumentRoot PATH
ServerName SERVERNAME

#**********************************************

Replace the bold entries with the appropriate values.

4) Starting Apache and MySQL services

$ service httpd start
$ service mysqld start

5) Make sure to configure firewall to allow http connections to your computer

$ system-config-firewall &
Check the WWW(HTTP) 80/TCP box

6) Joomla Installation

$ mkdir /home/www/
$ cd /home/www/
$ mkdir Joomla
$ cd Joomla
$ untar Joomla 1.5
$ chmod -R 755 /home/www/

Making configuration.php writable
$ touch configuration.php
$ chmod 777 configuration.php

Open firefox (or any other web browser) and type
http://IP_ADDRESS/Joomla/

Complete Installation following page 8 of Joomla! v 1.5 Quick Start Guide written by Kevin Hayne.

$ rm -rf installation/