/etc/network/interfaces

man resolvconf
man interfaces

http://linux-net.osdl.org/index.php/Bridge
示例:
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
#auto eth0
#iface eth0 inet dhcp
#iface eth0 inet static
#address 192.168.0.20
#netmask 255.255.255.0
#network 192.168.0.0
#broadcast 192.168.0.255
#gateway 192.168.0.1
#up route add -net 192.168.0.0/24 gw 192.168.0.1
#up route add -host 169.254.169.254 gw 192.168.0.1

auto wlan0 
iface wlan0 inet dhcp 
wpa-ssid myssid 
wpa-psk mypassword 
dns-nameservers 192.168.0.1

#iface wlan1 inet manual
#      wpa-driver wext
#      wpa-roam /etc/wpa_supplicant/wpa_supplicant.conf

#iface default inet dhcp

#auto wlan0

#allow-hotplug wlan0
#iface wlan0 inet dhcp
#    wpa-ssid     Lucifer
#    wpa-psk     11112222

桥接示例:
auto lo
iface lo inet loopback
iface eth0 inet manual
iface eth1 inet manual

auto br0
iface br0 inet dhcp
bridge_ports eth0 eth1

桥接管理:
apt-get install bridge-utils

auto br0
iface br0 inet dhcp
# For static configuration delete or comment out the above line and uncomment the following:
# iface br0 inet static
# address 192.168.1.10
# netmask 255.255.255.0
# network 192.168.1.0
# gateway 192.168.1.1
# dns-nameservers 192.168.1.5
# dns-search example.com
  pre-up ip link set eth0 down
  pre-up ip link set eth1 down
  pre-up brctl addbr br0
  pre-up brctl addif br0 eth0 eth1
  pre-up ip addr flush dev eth0
  pre-up ip addr flush dev eth1
  post-down ip link set eth0 down
  post-down ip link set eth1 down
  post-down ip link set br0 down
  post-down brctl delif br0 eth0 eth1
  post-down brctl delbr br0

重启网络
/etc/init.d/networking restart