1. 安装网卡
机器太新，以至于现有的Linux版本无法认出，比如机器找不到网卡，这时候怎么办呢？
别急，首先你需要知道网卡是什么型号的，以本实验室新购入的电脑为例，它的网卡是集成的，型号是Realtek RTL8168/8111 PCI-E Gigabit Ethernet NIC。然后我们到Realtek的官方网站去下载相应的Linux驱动程序r8168-8.005.00.tar.bz2，按照说明安装。
Unpack the tarball :
# tar vjxf r8168-8.aaa.bb.tar.bz2
Change to the directory:
# cd r8168-8.aaa.bb
If you are running the target kernel, then you should be able to do :
# make clean modules (as root or with sudo)
# make install
# /sbin/depmod -a
# /sbin/insmod ./src/r8168.ko (or r8168.o in linux kernel 2.4.x)
You can check whether the driver is loaded by using following commands.
# /sbin/lsmod | grep r8168(看看有没有加载网卡驱动)
# /sbin/ifconfig –a(看看有没有相关网卡被启动的信息)
If there is a device name, ethX, shown on the monitor, the linux
driver is loaded. Then, you can use the following command to activate
the ethX.
# ifconfig ethX up
,where X=0,1,2,...
这里也可以通过系统→管理→网络来设置IP地址等，最后激活。
1. Set manually
a. Set the IP address of your machine.
# ifconfig ethX "the IP address of your machine"
b. Set the IP address of DNS.
Insert the following configuration in /etc/resolv.conf.
nameserver "the IP address of DNS"
c. Set the IP address of gateway.
# route add default gw "the IP address of gateway"
