Install Sun Java JDK on Ubuntu 11.04

$sudo add-apt-repository "deb http://archive.canonical.com/ lucid partner"
$sudo apt-get update
$sudo apt-get install sun-java6-jdk

Ubuntu 11.04 Released

The release of Ubuntu 11.04 has seen the arrival of a new look and feel for Ubuntu. A whizzy, new launcher and dash, and a clever workspace manager are some of the biggest changes. Take a look at what’s new and then feel free to choose between the classic and new desktop experiences at login.

- http://www.ubuntu.com/

What's new in Ubuntu 11.04? from Canonical Design on Vimeo.

How to compare files in Linux, diff

To compare files in Linux, you can use the command "diff".

How to install Gnome3 on ubuntu 11.04/10.10

Install Gnome3 on ubuntu 11.04

Open the terminal and run the following commands

sudo add-apt-repository ppa:gnome3-team/gnome3
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install gnome-shell

For ubuntu 10.10 users

Open the terminal and run the following commands

Note:- This PPA works but it is outdated

sudo add-apt-repository ppa:ubuntu-desktop/gnome3-builds
sudo apt-get update
sudo apt-get install gnome3-session

After completing the installation Log out and back in, selecting the GNOME Session in GDM

Remove Gnome3 from ubuntu 11.04

Open the terminal and run the following commands

sudo apt-get install ppa-purge
sudo ppa-purge ppa:gnome3-team/gnome3

Source:
- Ubuntu Geek: How to install Gnome3 on ubuntu 11.04 (Natty)/Ubuntu 10.10 (Maverick)


Alternatively, it can be installed using Synaptic Package Manager.

Code::Blocks: a free C++ IDE

Code::Blocks is a free C++ IDE built to meet the most demanding needs of its users. It is designed to be very extensible and fully configurable.

Finally, an IDE with all the features you need, having a consistent look, feel and operation across platforms.

Built around a plugin framework, Code::Blocks can be extended with plugins. Any kind of functionality can be added by installing/coding a plugin. For instance, compiling and debugging functionality is already provided by plugins!

http://www.codeblocks.org/

Re-install Transmission BitTorrent Client

Transmission is my favorite BitTorrent Client in Ubuntu, so far. One day, Transmission cannot be started. When I click on the icon, nothing happen. And i cannot re-install it, using both Ubuntu Software Center and Synaptic Package Manager.

Finally, I re-install it using the commands:

$sudo add-apt-repository ppa:transmissionbt/ppa

$sudo apt-get update

$sudo apt-get install transmission

It's work again now:)

Install gcc-3.4 on Ubuntu 10.10

To Install gcc-3.4 on Ubuntu 10.10, you need to download and install:

- gcc-3.4-base
http://packages.ubuntu.com/hardy-updates/gcc-3.4-base

- cpp-3.4
http://packages.ubuntu.com/hardy-updates/cpp-3.4

- gcc-3.4
http://packages.ubuntu.com/hardy-updates/gcc-3.4

On each downloaded files, right click and select "Open with Ubuntu Software Center".

Finally, type the command to make gcc-3.4 as default.
~$export CC=gcc-3.4