[lubuntu] Trouble installing Flash

I ran the following command to install Flash on my Powerbook G4 running Lubuntu 12.04:

"sudo apt-get update && sudo apt-get install adobe-flashplugin -y"

Then it gave me this:

"Package adobe-flashplugin is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'adobe-flashplugin' has no installation candidate"

I'm kinda at a loss here.