I think this question should probably have been asked in the "Help" section.
I'm guessing you mean the flash plugin.
First, make sure the Universe and Multiverse repositories are enabled...
Go to System>Administration>Synaptic Package Manager (or wherever they hide the Synaptic Package Manager in the netbook edition)
When Synaptic opens, go to Settings>Repositories>Ubuntu Software (tab)
Put ticks in:
Community maintained Open Source software (universe)
Software restricted by copyright or legal issues (multiverse)
Whilst you're there you may also want enable the "Canonical Partner" repository...
Click the "Other Software" (tab), and put a tick in:
Now click the "Reload" button on the toolbar.
Now you need to install the "ubuntu-restricted-extras" package.
Still in Synaptic, type: ubuntu-restricted-extras into the "Quicksearch"box.
Look for it in the "Package" column in the main right-hand panel.
Click the little box to the left of ubuntu-restricted-extras and select "Mark for Installation"... click "Mark" on the next window that opens.
On the main Synaptic toolbar, click the "Apply" button.
That will download and install the flashplayer plugin and some other useful stuff like support for mp3's etc.
Last edited by PCNetSpec
on Sat Mar 05, 2011 11:06 pm, edited 7 times in total.