----Adding medibuntu respo to ubuntu

As per
 
command memo:

echo deb  karmic free non-free | sudo tee -a /etc/apt/sources.list
wget -q medibuntu-key.gpg -O- | sudo apt-key add -

sudo apt-get update

sudo apt-get install  skype 

I also see  a another method (better)

sudo wget karmic.list -O /etc/apt/sources.list.d/medibuntu.list

sudo apt-get update && sudo apt-get install medibuntu-keyring && sudo apt-get update ... 

//PPA的源

deb karmic main
deb-src karmic main