Installing Skype
简单描述下：
1. 在源服务器里面把Canonical Partner Repository
选上
2. 然后直接sudo apt-get install skype，就可以了。
Since Ubuntu 10.04 (Lucid Lynx), Skype is part of the Canonical partner repository. To install Skype add the Canonical Partner Repository and install Skype via the Software-Center or via the Terminal.
sudo apt-get update && sudo apt-get install skype
Installing Skype on older Ubuntu versions.
Skype is not available in any Ubuntu software repository, and therefore cannot be installed with Ubuntu's package management software such as Synaptic or apt-get without adding a repository containing Skype. There is the official Skype repository: Skype Forum
You can add the Apt source like this
echo "deb http://download.skype.com/linux/repos/debian/ stable non-free #Skype" | sudo tee -a /etc/apt/sources.list > /dev/null
Import the Apt key, even it is not used, but may be useful in future:
sudo apt-key adv --keyserver pgp.mit.edu --recv-keys 0xd66b746e
Install Skype:
sudo apt-get update && sudo apt-get install skype
Using a repository, you will automatically receive future updates to the software. Please be aware that the repository is not signed, so when you try to install Skype, you will get a warning.
If you don't want to do that, or can't (for example, if you're on amd64), perhaps the easiest way to install is from the Debian (.deb) package available directly from the Skype website. The downside of this is that you won't automatically get future updates, you will have to download the new versions as they become available.