网络配置：
方式1：网卡通过DHCP自动获取IP地址
$ sudo gedit /etc/network/interfaces
# 修改文件/etc/network/interfaces如下文
#-------------------------------------------------------------------------------
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
#
# The loopback network interface（配置环回口）
auto lo # 开机自动激lo接口
iface lo inet loopback # 配置lo接口为环回口
# The primary network interface （配置主网络接口）
auto eth0 #开机自动激活eth0接口
iface eth0 inet dhcp #配置eth0接口为DHCP自动获取
#-------------------------------------------------------------------------------
$ sudo /etc/init.d/networking restart # 重启网络
来自http://www.linuxidc.com/Linux/2010-03/24820.htm
apt-get错误
sudo rm /var/lib/apt/lists/* -vf
sudo apt-get update