Ubuntu skype 登陆 提示错误：加载数据库失败

本人用的Ubuntu12.0.4 64位，之前安装skype4.3一直都能正常使用，安装方法如下：

1. 把下述兩行加入 /etc/apt/sources.list
1-1. Ubuntu 14.04
deb http://archive.canonical.com/ubuntu trusty partner
deb-src http://archive.canonical.com/ubuntu trusty partner
1-2. Ubuntu 12.04
deb http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner

2. sudo apt-get update
3. sudo apt-get upgrade # 選項 可作 可不作

4. sudo apt-get install skype

但是当我把自己设为管理员权限之后，skype登陆不上，提示错误：加载数据库失败，可能有一客户端在使用。

查找半天，stackoverflow上的解决办法：

Step 1: Remove the old version of Skype (4.2 or older)

cd ~ && rm -r .Skype    
sudo apt-get remove skype skype-bin:i386 skype:i386
sudo apt-get install sni-qt:i386

Step 2: Install Skype version 4.3

For 32-bit Operating Systems: follow these steps

sudo apt-get update
sudo apt-get install gdebi
wget download.skype.com/linux/skype-ubuntu-precise_4.3.0.37-1_i386.deb
sudo gdebi skype-ubuntu-precise_4.3.0.37-1_i386.deb

For 64-bit Operating Systems: follow these steps

sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install gdebi
wget download.skype.com/linux/skype-ubuntu-precise_4.3.0.37-1_i386.deb
sudo gdebi skype-ubuntu-precise_4.3.0.37-1_i386.deb