win7 + VirtualBox + Ubuntu Server 网络桥接
1. 虚拟机网络设置2. 发现Ubuntu里找不到网卡，eth0都没有
于是设置静态IP
sudo vi /etc/network/interfaces
重启Ubuntu的网络：
sudo service networking restart
发现仍然找不到eth0
原因是Mac地址不对，删除文件 /etc/udev/rules.d/70-persistent-net.rules 后重启就可以了~
references:
http://blog.iyunv.com/xxd851116/article/details/7038260
https://forums.virtualbox.org/viewtopic.php?f=7&t=43090
just incase for myself (Installing Guest Additions in VirtualBox for an Ubuntu Server Guest):
http://blog.brettalton.com/2010/04/28/installing-guest-additions-in-virtualbox-for-an-ubuntu-server-guest/
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最近又重新搞了下和上面的有些不同
Windows 7 Home Premium SP1 x64
VirtualBox 4.3.12 + Ubuntu 12.04.2 LTS alternative i386 / Ubuntu 14.04 LTS server i386
网络的选择方式依然是从默认NAT改为桥接网卡, 设完以后
sudo service networking restart --- 失败
sudo ifdown -a
sudo ifup -a --- 成功，此时已经可以上网，主机也可访问该虚拟机
sudo vi /etc/network/interfaces:
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
这样的是动态IP，为了固定IP我改成了如下内容：
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet static
address 192.168.1.102
netmask 255.255.255.0
network 192.168.1.0
broadcast 192.168.1.255
gateway 192.168.1.1
dns-nameservers 202.101.172.35 202.101.172.47
然后重启networking依然会失败：
kenny@Kenny00:~$ sudo service networking restart
password for kenny:
stop: Unknown instance:
networking stop/waiting
不知道为啥，只能继续用 ifdown -a 和 ifup -a 来重启网络 = =b
安装SSH服务：sudo apt-get install openssh-server
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