I have tried following http://wiki.debian.org/FlashPlayer but on the very first command:
sudo aptitude install flashplugin-nonfree
oshirowanen@debian:~$ sudo aptitude install flashplugin-nonfree [sudo] password for oshirowanen: No candidate version found for flashplugin-nonfree No candidate version found for flashplugin-nonfree No packages will be installed, upgraded, or removed. 0 packages upgraded, 0 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B of archives. After unpacking 0 B will be used. oshirowanen@debian:~$
No idea what I'm doing wrong.