Ubuntu Server Edition 配置静态IP地址

转自：http://www.linuxidc.com/Linux/2009-09/21769.htm

Ubuntu Server Edition 配置静态IP地址学习笔记。

网卡配置文件位于
/etc/network/interface
假如要配置设备名为 eth0 的网卡则找到 eth0 原来的配置项

iface eth0 inet dhcp
将其注释掉然后修改其获取IP方式为静态IP

iface eth0 inet static    #意思是将网卡0设置为静态网址

address  192.168.1.250 #IP地址
netmask 255.255.255.0 #子网掩码
gateway 192.168.1.1    #网关
如果原来是通过DHCP方式获取IP和 DNS 服务器的那么还可能需要修改DNS服务器的配置。
dns 服务器配置文件为
/etc/resolv.conf

nameserver 202.102.154.3
nameserver 202.102.152.3
然后重启这个网卡以便配置生效

sudo ifdown eth0
sudo ifup eth0

转自：http://www.howtogeek.com/howto/ubuntu/change-ubuntu-server-from-dhcp-to-a-static-ip-address/

Change Ubuntu Server from DHCP to a Static IP Address

If the Ubuntu Server installer has set your server to use DHCP, you will want to change it to a static IP address so that people can actually use it.

Changing this setting without a GUI will require some text editing, but that’s classic linux, right?

Let’s open up the /etc/network/interfaces file. I’m going to use vi, but you can choose a different editor

sudo vi /etc/network/interfaces

For the primary interface, which is usually eth0, you will see these lines:

auto eth0
iface eth0 inet dhcp

As you can see, it’s using DHCP right now. We are going to change dhcp to static, and then there are a number of options that should be added below it. Obviously you’d customize this to your network.

auto eth0
iface eth0 inet static
        address 192.168.1.100
        netmask 255.255.255.0
        network 192.168.1.0
        broadcast 192.168.1.255
        gateway 192.168.1.1

Now we’ll need to add in the DNS settings by editing the resolv.conf file:

sudo vi /etc/resolv.conf

On the line ‘name server xxx.xxx.xxx.xxx’ replace the x with the IP of your name server. (You can do ifconfig /all to find out what they are)

You need to also remove the dhcp client for this to stick (thanks to Peter for noticing). You might need to remove dhcp-client3 instead.

sudo apt-get remove dhcp-client

Now we’ll just need to restart the networking components:

sudo /etc/init.d/networking restart

Ping www.google.com. If you get a response, name resolution is working(unless of course if google is in your hosts file).

Really pretty simple.

Updated Thanks to Nickname007 in the comments for noting that I forgot the DNS entries in the guide.