One of the more frustrating issues with UBUNTU is the WPA support not being enabled by default.  If you have a WPA enabled router at home, here are the instructions on how to configure WPA on UBUNTU.

The first step is to update the source list.  Run the following command

sudo apt-get
sudo apt-get install wpasupplicant
sudo apt-get install network-manager-gnome network-manager
sudo gedit /etc/network/interfaces

Comment out everything other than “lo” entries in that file and save the file
Create a file called /etc/default/wpasupplicant, add entry ENABLED=0 and save the file

sudo touch /etc/default/wpasupplicant

Reboot your system or use the following command

sudo /etc/init.d/dbus restart

Once you login back in to your machine you need to left-click the network manager icon in Gnome and select your wireless network It should prompts for password, type, etc and It will ask you to choose a password for your new “keyring”.
After entering all the details my wireless network was connected and working fine you can see in the following screen

My wireless network also detected available wireless access point around my home you can see this in the following screen

If you want to connect an existing wireless point you can see the following popup box asking for details of wireless network

If you want to create a new wireless network you can see the following screen with the available options and after entering all the details you need to click on connect

If you see the following error

The NetworkManager applet could not find some required resources. It cannot continue.

sudo gtk-update-icon-cache -f /usr/share/icons/hicolor/

Tags | Linux, Networking, Security, Ubuntu