how to install latest version of transmission bit torrent client on ubuntu linux

following instructions from : http://forum.transmissionbt.com/viewtopic.php?f=13&t=5604

for 9.04 / jaunty :

sudo gpg --keyserver keyserver.ubuntu.com --recv 976b5901365c5ca1
sudo gpg --export --armor 976b5901365c5ca1 | sudo apt-key add -

sudo vim /etc/apt/sources.list
# add the lines
deb http://ppa.launchpad.net/transmissionbt/ubuntu jaunty main
deb-src http://ppa.launchpad.net/transmissionbt/ubuntu jaunty main
:wq

sudo apt-get install transmission
OR
sudo apt-get update
sudo apt-get upgrade