wget -c http://www.roaringpenguin.com/files/download/rp-pppoe-3.10.tar.gz
sudo tar zxvf rp-pppoe-3.10.tar.gz -C /opt/
sudo chown -R root:root /opt/rp-pppoe-3.10/
#install tk8.5 and build-essential
apt-get install build-essential -y
apt-get install tk8.5 g++ -y
gksudo gedit /usr/share/applications/RP-PPPoE.desktop
Insert the following lines into the new file
[Desktop Entry]
Name=RP-PPPoE
Comment=RP-PPPoE
Exec=gksudo /opt/rp-pppoe-3.10/go-gui
Icon=pppoeconf.xpm
Terminal=false
Type=Application
Categories=Application;Network;
After that you can find RP-PPPoE in the Gnome menu under Applications -> Internet.