This command downloads and installs adobe flash player plugin

$ sudo apt-get install flashplugin-nonfree

Adobe Flash Player to be downloaded from www.adobe.com.
The End User License Agreement of the Adobe Flash Player
is available at www.adobe.com.

Command line way :::

% sudo apt-get install vlc vlc-plugin-esd mozilla-plugin-vlc

this command works on Ubuntu Intrepid Ibex 8.10, Hardy Heron LTS 8.04,Gutsy Gibbon 7.10,Feisty Fawn 7.04

From Ubuntu:

sudo apt-get install compiz compizconfig-settings-manager

If you are running Kubuntu then use this command to install the most commonly needed packages.

sudo apt-get install  compiz compizconfig-settings-manager
 compiz-kde compiz-fusion-plugins-main compiz-fusion-plugins-extra
 emerald librsvg2-common

to change this compiz confiuration - open terminal > and
enter command ccsm
this will open this compiz config settings manager