pre-up、up、post-up、pre-down、down、post-down

pre-up 网卡启用前的动作
up 启用时候的动作
post-up 启用后的动作
pre-down 关闭前的动作
down 关闭时动作
post-down 关闭后动作

sample:

auto lo 
iface lo inet loopback
iface eth0 inet dhcp
iface wlan0 inet static
address 10.0.0.1
netmask 255.255.255.0
broadcast 255.0.0.0
pre-up iptables-restore < /etc/iptables.rules

http://blog.ihipop.info/2010/11/1857.html

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