cd /etc/apt
sudo ln -s sources.list sources.list.bak
#备份原文件
sudo rm -rf sources.list
sudo gedit sources.list
#新建该文件
换源
修改 /etc/apt/sources.list 文件(修改前请备份原文件)
deb http://mirror.bjtu.edu.cn/ubuntu karmic main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu karmic-security main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu karmic-updates main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu karmic-backports main restricted universe multiverse
deb http://mirror.bjtu.edu.cn/ubuntu karmic-proposed main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu karmic main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu karmic-security main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu karmic-updates main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu karmic-backports main restricted universe multiverse
deb-src http://mirror.bjtu.edu.cn/ubuntu karmic-proposed main restricted universe multiverse
保存文件
sudo apt-get update
#最后，更新 apt-get
在终端下输入一下命令：
sudo apt-get install build-essential kernel-package libncurses5-dev fakeroot
