Category: Linux

Rule number one : don’t screw around with the browser of your enduser. Say that you were able to filter out the print menu item. What about the keyboard combination ctrl + P? You could override that again with some javascript but that only leaves the enduser clueless as you’re overriding standard functionality and that’s a big nono.

Besides that, you’re using javascript. That can be turned off by an enduser and then your clipboard erasing script also doesn’t work anymore. Poof and there goes your protection level.

try it . .

Thank you


for firefox try as below:


    • 1

      Make sure the new media player is installed on your computer. Popular media players include Real Player, QuickTime, Windows Media Player and WinAmp.

    • 2

      Open Mozilla Firefox and click “Tools” and then “Options” on the main menu.

    • 3

      Click the “Applications” tab. Scroll down on the list of file types until you find all of your media file types, including playlists, audio and videos.

    • 4

      Select the “Action” column box next to each of your media file types. You will see a drop-down box.

    • 5

      Change your default media player for each file type by clicking “Use other.” Choose “Always Ask” from the list if you want the browser to ask you every time which media player you want to use, or choose “Save File” if you want to automatically save the file to your computer instead of opening it.

    • 6

      Press “OK” to close the dialog box. Close and restart your browser to activate the new settings. Click on a song or video file in your browser to make sure it recognizes your choice from Step 4 and opens the file in your new default media player.

Thank you . .

Tweak your Ubuntu with Ubuntu Tweak

Ubuntu Tweak allows you to dig into configurations you may not have even known about…and do so with ease. That’s right, there’s very little “magic” or obfuscation involved with this tool…it’s just straight-up configuration options that might have otherwise been hidden (or at least not as easy to find). With Ubuntu Tweak you can:

Update your system.
Add sources for packages.
Change startup settings.
Configure numerous hidden desktop settings (including desktop backup and recovery).
Set up default folder locations.
Manage scripts and shortcuts.
Gather system information.
Manage file types and Nautilus settings.
Configure power manager settings.
Manage security settings.
So, how does it work? How is it installed? Let’s take a look.


You won’t find Ubuntu Tweak in the Ubuntu Software Center. Instead you need to download the .deb package and install it manually (or let your browser open up the USC for the installation). I prefer the manual method, so that is what I will demonstrate.

Download the most recent .deb package from the Ubuntu Tweak main page. Once you have that file downloaded, follow these steps:

Open up a terminal window.
Change into the directory holding the newly downloaded .deb file.
Issue the command sudo dpkg -i install ubuntu-tweak-XXX.deb Where XXX is the release number.
Type your sudo password and hit Enter.
Allow the package to install and then, when it is finished, close the terminal window.

To start up Ubuntu Tweak click on Applications | System Tools | Ubuntu Tweak. When you first start up the tool, it will give you a warning that you should enable the Ubuntu Tweak stable repository. Click OK to do this. Once that warning is out of the way, you can dig into the tweaking of your Ubuntu OS.

The interface for Ubuntu Tweak is very well done (see Figure A). As you can see, the left pane is broken into categories: Applications, Startup, Desktop, Personal, and System. Some of these tweaks will require the use of sudo and some will not (depending on the nature of the configuration).

One very handy configuration in the Personal section is Templates. Here you can drag and drop files into the main window and those files will then be added as document templates.

From an admin standpoint, a very handy option is the Login Settings in the Startup section. In this section you can configure:

Disable user list in GDM.
Play sound at login.
Disable showing the restart button.
Login theme.
Obviously not every option is a gem, but the ability to hide the user list as well as disabling the restart button in the login screen can be very handy.

Finally you will want to take a look at File Type Manager in the System section. This allows you to manage all registered file types on your system.

I have only scratched the surface of Ubuntu Tweak – it really is an incredibly powerful and handy tool that any and all Ubuntu users/administrators should get to know. From this single window you have the ability to configure/administrate many items from the System menu.

Ubuntu Developer Day India 2011

Event details


27 January 2011
9am – 6pm



Bangalore, India


What is the Ubuntu Developer Day?

Ubuntu Developer Day will be the largest event in Bangalore in 2011 that focuses on getting developers productive on the Ubuntu platform that is growing in popularity every day.

With keynote speeches from various members of the Canonical team, as well as hands-on technical sessions it is designed to deliver a great way for any developer to rapidly get up-to-speed on Ubuntu.

Register now to avoid disappointment.


What’s on the agenda?

The day will have a strong technical focus, with confirmed topics including:

  • How Canonical works with developers
  • The opportunity for ISVs
  • The Ubuntu cloud-computing proposition
  • How to code successfully with Ubuntu
  • and much more…


Who should attend?

The event will be of interest to engineers and developers with an a professional interest in using Ubuntu as a developer platform or in developing applications for the Ubuntu user base.


What is the cost?

The event is sponsored by Canonical and is free of charge.

Lunch and refreshments will be provided by Canonical.


How do I register?

Go to our registration form to secure your place.


Make sure you register before 20th January 2011 to guarantee your place as places are limited and subject to availability.

Oracle released VirtualBox 4.0, a new major release. It now has an open architecture using extension packs and the base package is under GPLv2.

VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Not only is VirtualBox an extremely feature rich, high performance product for enterprise customers, it is also the only professional solution that is freely available as Open Source Software under the terms of the GNU General Public License (GPL).

What is new in virtualbox 4.0

VirtualBox 4.0.0 (released 2010-12-22)

This version is a major update. The following major new features were added:

* Reorganization of VirtualBox into a base package and Extension Packs; see chapter 1.5, Installing VirtualBox and extension packs, see the manual for more information
* New settings/disk file layout for VM portability; see chapter 10.1, Where VirtualBox stores its files, see the manual for more information
* Major rework of the GUI (now called “VirtualBox Manager”):
o Redesigned user interface with guest window preview (also for screenshots)
o New “scale” display mode with scaled guest display; see chapter 1.8.5, Resizing the machine’s window, see the manual for more information
o Support for creating and starting .vbox desktop shortcuts (bug #1889)
o The VM list is now sortable
o Machines can now be deleted easily without a trace including snapshots and saved states, and optionally including attached disk images (bug #5511; also, VBoxManage unregistervm –delete can do the same now)
o Built-in creation of desktop file shortcuts to start VMs on double click (bug #2322)
* VMM: support more than 1.5/2 GB guest RAM on 32-bit hosts
* New virtual hardware:
o Intel ICH9 chipset with three PCI buses, PCI Express and Message Signaled Interrupts (MSI); see chapter 3.4.1, “Motherboard” tab, see the manual for more information
o Intel HD Audio, for better support of modern guest operating systems (e.g. 64-bit Windows; bug #2785)
* Improvements to OVF support (see chapter 1.12, Importing and exporting virtual machines, see the manual for more information):
o Open Virtualization Format Archive (OVA) support
o Significant performance improvements during export and import
o Creation of the manifest file on export is optional now
o Imported disks can have formats other than VMDK
* Resource control: added support for limiting a VM’s CPU time and IO bandwidth; see chapter 5.8, Limiting bandwidth for disk images, see the manual for more information
* Storage: support asynchronous I/O for iSCSI, VMDK, VHD and Parallels images
* Storage: support for resizing VDI and VHD images; see chapter 8.21, VBoxManage modifyhd, see the manual for more information.
* Guest Additions: support for multiple virtual screens in Linux and Solaris guests using X.Org server 1.3 and later
* Language bindings: uniform Java bindings for both local (COM/XPCOM) and remote (SOAP) invocation APIs

In addition, the following items were fixed and/or added:

* VMM: Enable large page support by default on 64-bit hosts (applies to nested paging only)
* VMM: fixed guru meditation when running Minix (VT-x only; bug #6557)
* VMM: fixed crash under certain circumstances (Linux hosts only, non VT-x/AMD-V mode only; bugs #4529 and #7819)
* GUI: add configuration dialog for port forwarding in NAT mode (bug #1657)
* GUI: show the guest window content on save and restore
* GUI: certain GUI warnings don’t stop the VM output anymore
* GUI: fixed black fullscreen minitoolbar on KDE4 hosts (Linux hosts only; bug #5449)
* BIOS: implemented multi-sector reading to speed up booting of certain guests (e.g. Solaris)
* Bridged networking: improved throughput by filtering out outgoing packets intended for the host before they reach the physical network (Linux hosts only; bug #7792)
* 3D support: allow use of CR_SYSTEM_GL_PATH again (bug #6864)
* 3D support: fixed various clipping/visibility issues (bugs #5659, #5794, #5848, #6018, #6187, #6570)
* 3D support: guest application stack corruption when using glGetVertexAttrib[ifd]v (bug #7395)
* 3D support: fixed OpenGL support for libMesa 7.9
* 3D support: fixed Unity/Compiz crashes on natty
* 2D Video acceleration: multimonitor support
* VRDP: fixed rare crash in multimonitor configuration
* VRDP: support for upstream audio
* Display: fixed occasional guest resize crash
* NAT: port forwarding rules can be applied at runtime
* SATA: allow to attach CD/DVD-ROM drives including passthrough (bug #7058)
* Floppy: support readonly image files, taking this as the criteria for making the medium readonly (bug #5651)
* Audio: fixed memory corruption during playback under rare circumstances
* Audio: the DirectSound backend now allows VMs to be audible when another DirectSound application is active, including another VM (bug #5578)
* EFI: support for SATA disks and CDROMs
* BIOS: reduce the stack usage of the VESA BIOS function #4F01 (Quake fix)
* OVF/OVA: fixed export of VMs with iSCSI disks
* Storage: Apple DMG image support for the virtual CD/DVD (bug #6760)
* Linux host USB support: introduced a less invasive way of accessing raw USB devices (bugs #1093, #5345, #7759)
* Linux hosts: support recent Linux kernels with CONFIG_DEBUG_SET_MODULE_RONX set
* Guest Additions: Shared Folders now can be marked as being auto-mounted on Windows, Linux and Solaris guests
* Linux Additions: Shared Folders now support symbolic links (bug #818)
* Linux Additions: combined 32-bit and 64-bit additions into one file
* Windows Additions: automatic logon on Windows Vista/Windows 7 is now able to handle renamed user accounts; added various bugfixes

Install virtualbox 4.0 in ubuntu 10.10/10.04/9.10

Edit /etc/apt/sources.list file

gksudo gedit /etc/apt/sources.list

Add one of the following line

For ubuntu 10.10 users

deb maverick contrib

For ubuntu 10.04 users

deb lucid contrib

For ubuntu 9.10 users

deb karmic contrib

Save and exit the file

Add gpg key

wget -q -O- | sudo apt-key add –

Update source list

sudo apt-get update

Install virtualbox 4.0

sudo apt-get install virtualbox-4.0

Note: Ubuntu/Debian users might want to install the dkms package to ensure that the VirtualBox host kernel modules (vboxdrv, vboxnetflt and vboxnetadp) are properly updated if the linux kernel version changes during the next apt-get upgrade. For Debian it is available in Lenny backports and in the normal repository for Squeeze and later. The dkms package can be installed through the Synaptic Package manager or through the following command:

sudo apt-get install dkms

What to do when experiencing The following signatures were invalid: BADSIG … when refreshing the packages from the repository?

# sudo -s -H
# apt-get clean
# rm /var/lib/apt/lists/*
# rm /var/lib/apt/lists/partial/*
# apt-get clean
# apt-get update

Re shared Post from


What’s New in Ubuntu 10.10?

New Desktop Wallpaper

This is one of the tricks Ubuntu has been playing on its users for years. Every time when a new version of Ubuntu comes out, we see a brand new set of wallpapers that have been designed in align with the Ubuntu philosophy. This indeed impresses the Ubuntu user. With 10.10, it is not just a couple of wallpapers, but a rich set of Ubuntu wallpapers for the eye of its users.


The Installer

There are many types of Linux installers used by various flavors of Linux. When Ubuntu was first released, they took a unique turn in terms of the installer and tried hard to make it a simple and autonomous process. In align to the original goal, the latest Ubuntu installer has gone through many improvements in terms of both graphical user interface and the functionality. The new installer allows the users to download the packages from the Internet at the initial stages of the configuration process. This avoids the earlier process of updating the entire system at the first boot. Therefore, Ubuntu system becomes up-to-date and functional as soon as the installation process ends.

Theme Tweaks

Ubuntu theme is one of the most loved features of Ubuntu distribution. The developers and designers of Ubuntu made the themes quite unique for Ubuntu which catered for both usability and eye-candy requirements. There are two new themes introduced by Ubuntu: Radiance and Ambiance. When it comes to features and basic look-and-feel, the two themes are the same, except the color tone. One is darker than the other.

Ubuntu Software Centre

This is one of the most hyped features of Ubuntu 10.10. It is correct to say that, this has been the most anticipated feature of Ubuntu 10.10 for some time. The existence of Ubuntu Software Center was announced at an Ubuntu Developer Convention and the hype started from that day onwards. The Software Center makes it easy for anyone to install any software application on Ubuntu, including commercial software. The Software Center functions the same way as how AppStore functions for Apple. At the moment, there are only a few software that can be bought through Software Center. With time, this is expected to expand.

The Volume Indicator and Music Player Integration

For the music enthusiasts, this is one of the most important features. Without having to open your favorite music player every time you want to change to a new song or control the volume, you can now do all this using the top menu bar’s system tray. By integrating both volume control and music player, the new system tray is less cluttered. By default, Ubuntu’s default music player, Rhythmbox works perfectly with this integration. To be frank, I haven’t tried out any other music player with this setup yet. I will let you know as soon as I try something else to see whether those music players can be controlled through this implementation.

Gnome Shell

Gnome shell has been there for some time as an unstable build. The latest version of Ubuntu has decided to add Gnome shell as a preview for what is coming next from Gnome. This is one of the important directions of Gnome development and its roadmap. The users who would like to experience the future of Gnome shell, can go ahead and start using it. Gnome shell has been designed with brand new design and usability features in mind. The Gnome shell resembles a netbook operating system.


Ubuntu App Store

App Store’ is one of the words introduced by Apple in the recent history of commercial software applications. The concept basically offers an online store where you can purchase various applications written for a specific platform. As an example, there are various App Stores setup for Mac software, iPhone/iPad and even google’s market place and most recent google chrome webapps software etc. These online stores do sell applications that range from simple screensavers to software worth a few thousand dollars.

Ubuntu, one of the mainstream Linux distributions adopted the same concept of an online store for making the life easy for the ordinary Linux user. But what does it mean by purchasing open source applications through an online store? Isn’t it contradictory? Open source is not for purchase right? Let’s have a detailed look into Ubuntu App Store in order to figure out what’s going on there.

The App Store was first introduced by Canonical, the creators and sponsors of Ubuntu during an Ubuntu developer summit. The name of the online application store went through quite an evolution in terms of the name. It was first code named as AppCenter and now it is called simply Ubuntu Software Store. This is a completely a brainchild of Canonical and the software store surely increase the value of Canonical as an open-source / Linux company.

The main feature of this app store when compared to traditional software installation mechanism on Linux is the proper categorization. Almost all the free and open source software under the Sun has been carefully categorized, so the regular users can browse through the categories and install what they prefer to install. On the other hand, this again helps people to tryout Ubuntu more, and eventually increasing the conversion into Linux.

In a Linux system, there are various ways of installing an application. One can download the source and compile it by oneself and install. Or, they can use many package management systems and they are different from one another. When it comes to the Ubuntu app store, there is a unique specialty in terms of installation methodology. The uses of the App Store can just click and install any application available in the App Store. But in the backend, not all these applications come in the same installation methodology. They share different methodologies such as Update Manager, Synaptics, and Gdebi. The App Store has unified all these methods into one easy step, so the user does not have to be bothered about the method used for installing the applications. This unifications of software installation on Linux was long due task done by the Ubuntu team.

In addition to the installation of new software, Ubuntu App Store can also be used for installing updates for the existing software applications. This makes maintaining and updating a Linux system smooth and seamless.

Have you heard about Launchpad? This is a free and open-source software repository where users can download the developer and latest stable versions of software. Canonical is now planning to integrate the app store with the Launchpad, so Linux users can access the latest builds available in the Launchpad as well. Once this is done, Ubuntu App Store will be useful for both regular users as well as advanced users who are keen on laying their hands on the latest builds.

Now, let’s go back to our original questions; purchasing open source software. As you can now understand, although this is an app store, you do not have to buy the software, rather download and install them for free of charge. Although this follows the same commercial format of an App Store, it also protects the open source interests by offering all the open source software. In addition to the open source software, there are free but proprietary software (such as device drivers) available in the App Store.

%d bloggers like this: