Adding Flash Player to Debian

1) Add the backports repository by editingĀ  /etc/apt/sources.lst (must be root) and adding the following line:

deb http://www.backports.org/debian/ lenny-backports main contrib non-free

Run the following:

#aptitude update
#aptitude install debian-backports-keyring

(Ignore any warning that occur with the above 2 commands, the install will correct those)
If you run #aptitude update again the warnings should be gone

2) Install Adobe Flash

#aptitude install flashplugin-nonfree

3)You shouldn’t need this step, but just in case run

and make sure the correct one (/usr/lib/flashplugin-nonfree/libflashplayer.so) is selected. It should be the current default.

4) Start Iceweasel and go the location about:plugins and you should see the latest Flash.