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翻译中 Luox
Daily Ubuntu Tips – Create Virtual Network Cards In Ubuntu Linux
================================================================================
This tutorial is for users who want to experiment a bit with Ubuntu Linux. It not for everyone, especially those with machines that are used in production.
If you know a thing or two about networking and IP networks, then you know that in most cases, each network card will only be assigned one IP address. It’s a one to one thing and that’s what we’re used to.
The thing with one network card and one IP address is, you can only host or run in single network service/port on a machine with one nic card and IP address. For example, if you wish to run a web server, on port 80, only one web server will listen on that one IP address and that port #. That’s how it’s designed to work.
So, instead of the one-to-one relation with network cards and IP addresses, you can create virtual network cards that can be assigned individual IP addresses. So, a single physical network card can host unlimited sub-nic cards or virtual nic. Each can then be assigned their own IP addresses with assigned ports.
This brief tutorial is going to show you how to do that in Ubuntu. It’s a great way to run and test multiple network services with single port # on a single computer with one network card.
To get started, run the commands to open the network interfaces file.
sudo gedit /etc/network/interfaces
Then add as many virtual network cards as you want by following the steps in the picture below. By default, Linux machine assigned eth0 name to the first network card. So if your machine has one network card, it will be named eth0.
To add virtual network cards, create more static cards and name them eth0:1, eth0:2, eth0:3, etc. (eth0 followed by colon and a number).
![](http://www.liberiangeek.net/wp-content/uploads/2013/11/virtualnetworkcardubuntu.png)
Also, for each network card you create, make sure each network is in a separate subnet.. this is networking 101.
When you’re done, save the file and reset the networking service by running the commands below.
sudo service networking restart
That’s it!
![](http://www.liberiangeek.net/wp-content/uploads/2013/11/virtualnetworkcardubuntu1.png)
Enjoy!
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Ubuntu每日小贴士 - 在Ubuntu下创建虚拟网卡
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这个教程是为那些想用Ubuntu做点小实验的用户准备的.这并不适用于所有人,尤其是那些正在使用生产机器的用户.
如果你对网络运行和IP网络有所了解,你应该知道在大多数情况下,每个网卡只会分配一个IP地址.我们习惯认为这是一对一的事物.
一个网卡对应一个IP地址,你在一台机器用一个网卡和IP地址只能绑定或运行单一的网络服务/端口.例如,如果你想在80端口运行一个web服务器,只有一个web服务器将监听一个IP地址和端口#.这就是它如何工作的.
所以,网卡和IP地址并不是一对一的关系,你可以创建可以单独分配IP地址的虚拟网卡.因此,单一的物理网卡可以群集无限的子网卡或虚拟网卡.每一个都能分配它自己IP地址到对应的端口.
这个简短的教程将展示给你如何在Ubuntu做到这些.这是极好的方式在一台电脑上用一张物理网卡和单一的端口#运行和测试多个网络服务.
动手吧,运行下列命令打开网络接口文件.
sudo gedit /etc/network/interfaces
然后按照下图中的步骤吗,尽可能多的添加你想要的虚拟网卡.默认情况下,Linux会给第一张网卡分配eth0的名称.所以如果你的机子只有一张网卡,那么它会被命名为eth0
添加虚拟网卡,创建多个静态网卡并命名为eth0:1,eth0:2,eth0:3, etc.(eth0后面紧跟冒号和数字).
![](http://www.liberiangeek.net/wp-content/uploads/2013/11/virtualnetworkcardubuntu.png)
对于你创建的每一个网卡,也要确保网络都是不同的子网 ..
完成以后,保存文件并用下列命令重置网络服务.
sudo service networking restart
就是这样!
![](http://www.liberiangeek.net/wp-content/uploads/2013/11/virtualnetworkcardubuntu1.png)
玩得开心!
--------------------------------------------------------------------------------
via: http://www.liberiangeek.net/2013/11/daily-ubuntu-tips-create-virtual-network-cards-in-ubuntu-linux/
译者：[Luoxcat](https://github.com/Luoxcat) 校对：[校对者ID](https://github.com/校对者ID)
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出