Apt-Get Utility: Ubuntu's Advanced Packaging Tool (APT)

The apt-get command is a powerful command-line tool used to work with Ubuntu's Advanced Packaging Tool (APT) performing such functions as installation of new software packages,  upgrade of existing software packages,  and even upgrading the entire Ubuntu system.

Some examples of popular uses for the apt-get utility:

Install a Package: Installation of packages using the apt-get tool is quite simple. For example, to install the network scanner nmap, type the following:
sudo apt-get install nmap

Remove a Package: Removal of a package or packages is also a straightforward and simple process. To remove the nmap package installed in the previous example, type the following:
sudo apt-get remove nmap

Update the Package Index: The APT package index is essentially a database of available packages from the repositories defined in the /etc/apt/sources.list file. To update the local package index with the latest changes made in repositories, type the following:
sudo apt-get update

Upgrade Packages: Over time, updated versions of packages currently installed on your computer may become available from the package repositories (for example security updates). To upgrade your system, first update your package index as outlined above, and then type:
sudo apt-get upgrade

How to add Trash Icon to your Ubuntu Desktop

You can add Trash icon to the desktop lets see how to add Trash icon.

Type gconf-editor into the Alt+F2 run dialog to open the Gnome Configuration Editor

Now browse down to the following key: apps\nautilus\desktop

On the right hand side, you will see an entry called trash_icon_visible. Just check the box. You can also change the trash_icon_name if you’d like.
That's all.

Install Adobe Flash Player 64-bit on Ubuntu 11.04

Steps:
Goto linux Terminal window then type the following command,
sudo add-apt-repository ppa:sevenmachines/flash
After that hit Enter.

Now type the following command and hit enter,
sudo apt-get update
After its completion type the below command,
sudo apt-get install flashplugin64-installer
Note:
Hit “Y” when asked and close the terminal window when the installation is completed. The 32-bit edition of the currently installed Adobe Flash Player plugin will be automatically uninstalled.

That’s it  Now restart your web browser to make the changes effective.
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