sudo apt-get update
之后报错：
W: Unknown Multi-Arch type ‘no‘ for package ‘compiz-core‘ W: Unknown Multi-Arch type ‘no‘ for package ‘compiz-gnome‘ W: Unknown Multi-Arch type ‘no‘ for package ‘compiz-core‘ W: Unknown Multi-Arch type ‘no‘ for package ‘compiz-gnome‘ W: You may want to run apt-get update to correct these problems
sudo apt-get install -f apt
过后就正常了。
要是还不行你来找我。反正我也不会。
原文：http://www.cnblogs.com/anpengapple/p/5111709.html