wget -c http://archive.ubuntu.com/ubuntu/pool/multiverse/f/flashplugin-nonfree/flashplugin-nonfree_10.0.32.18ubuntu1_i386.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/multiverse/f/flashplugin-nonfree/flashplugin-installer_10.0.32.18ubuntu1_i386.deb
wget -c http://archive.ubuntu.com/ubuntu/pool/main/g/gsfonts-x11/gsfonts-x11_0.21_all.deb
sudo dpkg -i gsfont*.deb
sudo dpkg -i flash*.deb
If you are using Swiftfox, also run these command:
rm /usr/lib/swiftfox/plugins/libflashplayer.so
ln -s /usr/lib/flashplugin-installer/libflashplayer.so /usr/lib/swiftfox/plugins/libflashplayer.so