16 August, 2016

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The Top 5 Ubuntu based Linux distributions

ubuntu 

In this article I am introducing some of the most amazing derivatives of Ubuntu. Ubuntu  based distros are basically Ubuntu with specialized applications in a particular domain. For instance, it could be in education like Edubuntu or multimedia or Mythubunu. Read on to find out more.

Kubuntu
It uses the K desktop Environment(KDE) instead of GNOME or Unity which comes by default in Ubuntu. Its released twice a year, same as Ubuntu.  So, if you love Ubuntu and like the flavor of the KDE window manager, then you should think of installing this instead of Ubuntu. 
Some technologies used in Kubuntu:
  • KDE software: It provides applications 
  • Plasma: KDE's desktop and netbook workspaces
  • Linux: it gives its kernel
  • Debian: supply most of its packages
On comparison with Ubuntu:
SoftwareUbuntuKubuntu
Kernel & CoreLinux Kernel & Ubuntu CoreLinux Kernel & Ubuntu Core
GraphicsX. Org ServerX. Org Server
SoundPulse AudioPulse Audio
MultimediaGStreamerGStreamer
DesktopUnityPlasma Desktop
Primary ToolkitGTK+, Clutter & QtQt
BrowserFirefoxRekonq
OfficeLibreOfficeLibreOffice
Email & PIMThunderbirdKontact
Download from: Kubuntu.org
kubuntu
Edubuntu
This is basically Ubuntu+educational applications. It also includes some educational tools,content, and themes. So, its good for children,students and schools. 
You can download it from Edubuntu.org
edubuntu
Unity Desktop: You can also opt for the newest Unity based desktop during installation in Ubuntu.
Unity desktop
Xubuntu
This is again Ubuntu but with another window manager called XFCE. It fits well on all Laptops, Desktops and servers as it is pretty lightweight. 
One of the aims of the XFCE desktop environment is to use fewer system resources than the default Ubuntu Unity desktop. Its developers claim that the minimum RAM Xubuntu could be run is 128 MB even at times when 256 MB of RAM was recommended. Some standard testing showed  that it uses approximately 25 MB less application memory and also  takes significantly less space into  its buffers and cache than Ubuntu." Pretty good for older and resource crunched PC's.
Download Mirror: Xubuntu.org
Desktop
Gobuntu
It is the OS whose community follows the Free Software Foundation's four freedoms  So, it doesn't include any applications, driver or firmware which are not having the full source or whose license does not provide the right to use, study,modify and redistribute the body of work. So, if you are  a FOSS activist and adhere to all its policies, you must try this. 
Download Gobuntu
Desktop
Ubuntu Studio
Here is the OS for people interested in multimedia. It provides a suite of some of the best applications for multimedia work which includes audio and video components. Soon after its first release  it gained a huge popularity among audio and video enthusiasts.  
Download Mirror: Ubuntu Studio.org
Desktop
These are just a few and we have barely scratched the surface and completey new ones are spawning from Ubuntu and even from other Ubuntu based distros everyday. We will be soon updating the post with other upcoming distros, so stay tuned.

 


 

12 August, 2016

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How to Run udev-discover in Ubuntu | The complete Device Manager Tool for the Linux Kernel

 

Udev-discover is the complete graphical device manager application for the linux kernel. It runs perfectly well on Ubuntu. It manages all device nodes in /dev directory of your LInux partiion. 
It runs entirely in user space and you can do adding/removing devices,including firmware load,filter and search devices etc. For hackers working with udev, it offers features like browsing the sysfs tree via udev, monitorize udev device events,reports udev device info and udev properties etc.
Installing udev-discover
Open the terminal and run the following commands one by one

$ sudo apt-add-repository ppa:fontanon/udev-discover
$ sudo apt-get update
$ sudo apt-get install udev-discover

To run:
use following command in terminal
$ udev-discover
Open Source:
Its a open source project and if you want to have a look on its source or want to contribute to it, its hosted on github

04 August, 2016

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Database: Difference between repetition and redundancy



Student name
Address
Tony
Seattle
James
Seattle
Alex
Seattle
Thomas
Seattle
Amar
Seattle

This table represents Student’s name and their address. We can see here that all the students have same address. Is the data redundant here? Are we wasting memory? No. The data here will not be called redundant. Its just repetition of data that we see here.

Lets take another example:

Student ID
Student name
email
course
duration
fee
100
Tony
Oracle
60
10000
200
James
Oracle
60
10000
300
Alex
Oracle
60
10000
400
Thomas
Oracle
60
10000
500
Amar
Oracle
60
10000

Is the data redundant here? Is it wastage of memory? Yes.
The repetition of data caused by the existing functional dependency which is causing wastage of memory is called redundancy.

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