Debian 正常網路設定是於 /etc/network/interfaces, 可見 /etc/network/interfaces 內容大致如下:
auto lo
iface lo inet loopbackauto eth0
# iface eth0 inet manual
iface eth0 inet static
address 10.1.1.2
netmask 255.255.0.0
network 10.1.0.0
broadcast 10.1.255.255
gateway 10.1.1.1
# dns-nameservers 168.95.1.1 168.95.192.1
# dns-search longwin.com.tw
#up "/sbin/route add -net 172.16.120.0 netmask 255.255.255.0 gw 10.1.3.3 metric 1"
#up "/sbin/route add -net 172.16.0.0 netmask 255.255.255.0 gw 10.1.10.20 metric 1"
#up "/sbin/route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.1.10.20 metric 1"
#down "/sbin/route del -net 172.16.120.0 netmask 255.255.255.0 gw 10.1.10.20metric 1"
#down "/sbin/route del -net 172.16.0.0 netmask 255.255.255.0 gw 10.1.10.20 metric 1"
#down "/sbin/route del -net 1.0.0.0 netmask 255.0.0.0 gw10.1.10.20 metric 1"auto eth1
iface eth1 inet static
address 10.10.11.2
netmask 255.255.255.128
network 10.10.0.0## for adsl pppoe
#auto dsl-provider
#iface dsl-provider inet ppp
#provider dsl-provider