Wednesday, March 30, 2011

3 Good Games For Linux

 Three open source games for Linux , I installed the games on Fedora and I Njoyed all,
I liked Supertux perhaps because it is similar to super mario one my favorite games on Video Games, the rest of two games are nice ones also with good graphics.
SuperTux is a classic 2D jump'n run sidescroller game in a style. The game was inspiried by the Nintendo Super Mario Series. The Milestone 1 release of SuperTux features: 9 enemies 26 playable levels Software and OpenGL rendering modes configurable joystick and keyboard input new music completely redone graphics. And it is also a crossplatform.

I tested this game, is funny almost the same as Super mario game
For CentOS & Fedora
                       #yum install supertux
Pingus is a free computergame inspired by Lemmings and Created by Ingo Ruhnke.
In this TUX(penguin) instead of lemmings.

For CentOS & Fedora
                        #yum install pingus
WarMUX is a free and open-source game. Have the mascots of your favorite free software titles battle it out in the Wormux arena using dynamite, grenades, baseball bats and other bazookas... Exterminate your opponent in a 2D environment with toon-style scenery.
For CentOS & Fedora
                       #yum install wormux

Monday, March 28, 2011

IM Chat Clients Mostly Used

 IM Chat Clients Mostly Used on Fedora

An instant messaging client is a software application 
that enables the user to engage in instant messaging.
Many IM chat clients available to use, but which one is the best choice for you. Basically most of them do the same job for me i usually use Pidgin my favorite one. many IM clients supporting connecting to multiple networks accounts “Hotmail, yahoo, facebook, irc, gmail, ICQ, AIM, myspace, Japper, even more with adding custom API”
  1. PSI IM
    To install any chat client you have to download it from its web site or you can install it through yum on fedora by respective steps
    First you need to Super User (as Root)
    For pidgin
               #yum -y install pidgin

    For empathy
               #yum -y install empathy

    For  Emesene
              #yum -y install emesene

    For PSI
             #yum install psi

    After Installing any of the chat client 
    Njoy the Instant Messaging

Saturday, March 26, 2011

High level language and Low level Computer language

Difference between high level language and low level language

High level languages allow much more abstraction than low level languages. This allows algorithms and functions to be written without requiring detailed knowledge of the hardware used in the computing platform. The compiler provides this interface transparently for the programmer.
Examples of high level languages include C, C++, Java, etc.

Low level languages will require more involvement with the actual register and interrupt interfaces to the hardware. This can provide more control and efficiency for the program and can be good for applications which need high speed execution, but high level compilers are much better at optimizing for speed now.

Examples of low level languages include machine language specific to each processor and assembly language specific to each processor.



Friday, March 11, 2011

Customizing the splash image in Bootloader

Customizing the splash image in Bootloader

The splash image is the image shown in the background when GRUB (the Grub Shell) is displaying the list of operating systems you can boot.
Normally, this is the corporate logo of your Linux distribution. But its very simple to customize it to an image of your choice.
All you need is the GIMP and gzip.
For this you have to follow the simple steps
firsty you need root access and follow the simple steps

1)Start the GIMP.

2)Click on File->New or type Ctrl+N

3)In the new image dialog, change Width to 640 pixels and Height to 480                  pixels. (The image should be of size 640x480 pixels.) Now click OK.

4)Create the image which you would like to be the splash image.

5)After you have finished creating the image,
    hit Alt+i or right click on the image and click on Image->Mode->Indexed...

6)In the Indexed Color Conversion dialog that appears,
    click on the radio button "Generate optimal Palette" and
     in "# of colors" enter 14. Click OK.(The image should be of only 14 colors)

7)Now right-click on the image and click on File->Save As...
     Save the file as  splash.xpm in a directory of your choice.

8)Now open a terminal window and navigate to the directory where you have
     saved splash.xpm

9)Now key in gzip splash.xpm

10)You will find that a file named splash.xpm.gz is created in the directory
     where splash.xpm used to exist.

11)Copy this splash.xpm.gz to the /boot/grub directory.
     You may want to back up the pre-existing splash.xpm.gz file in
      the /boot/grub directory first.

That's it! When you reboot, you will find your image in the background, with the menu of operating systems etc. in the foreground.

Wednesday, March 9, 2011

Change Login Screen On Fedora 14

I’ve been doing some tweaks on the machine I set up with Fedora 14 (Laughlin) using Gnome. Things were OK until I decided to change the login screen image. I did a Google search and found a solution that didn’t work for me. I have also read from forums that there was no way to change the image unlike the earlier versions of Fedora. I then had this idea of finding the image used as the login screen background and overwriting it with my preferred image. 
So I checked the /usr/share/backgrounds/ directory and found a “laughlin” folder. Inside it is a folder named “default” that contains three other folders named normalish, standard, and wide and a laughlin.xml file. The three folders contained the default login screen image.
If you open the xml file with a text editor, you’ll notice that a part of it specifies the path of the Laughlin wallpaper. Wide, Normalish, and Standard specifies the image dimensions. And using this xml file, we can change the login screen image.

                                             Laughlin XML File
Here’s what I did. First, I edited my image three times using the specified dimensions (this is optional) and saved them as PNG files. I then copied them to the three folders with respect to their dimensions.
Firstly go to super User and then follow the steps as per your need 

# cp /current/file/location/filename3.png /usr/share/backgrounds/laughlin/default/normalish/

Using vi, edit laughlin.xml and replace the filenames and save the file. See image below.

Edited Laughlin XML File
I logged off and there was my new login screen. 
Njoy the New login background