Ubuntu10.10网卡配置文件重启失效
环境：ubuntu 10.10
目标：配置网卡启动时加载iptables规则
网络上搜到的各种操作：
sh -c "iptables-save > /etc/iptables.rules"
vi /etc/network/interfaces
## 目标网卡下增加一条命令
## pre-up iptables-restore < /etc/iptables.rules
但是，经测试发现。重启后这些配置会丢失，查看这个文件头会发现。
# This configuration file is auto-generated.
# WARNING: Do not edit this file, your changes will be lost.
# Please create/edit /etc/network/interfaces.head and/etc/network/interfaces.tail instead,
# their contents will be inserted at the beginning and at the end
# of this file, respectively.
#
# NOTE: it is NOT guaranteed that the contents of/etc/network/interfaces.tail
# will be at the very end of this file.
文件写得很明确，/etc/network/interfaces是自动生成的。如果我们需要自定义配置，那就创建/etc/network/interfaces.head或/etc/network/interfaces.tail。其中/etc/network/interfaces.tail并不推荐。
以下是一个示例：
auto venet0:0
iface venet0:0 inet static
address 184.22.224.125
netmask 255.255.255.0
pre-up iptables-restore < /etc/iptables.rules
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