Configuring Linux on a network

Configuring the network interface and routing by
using commands /sbin/ifconfig and /sbin/route

Check the interface configuration:

/sbin/ifconfig

Check the routing configuration:

/sbin/route -n

netstat -nr

Stop the interface:

/sbin/ifconfig eth0 down

/sbin/ifdown eth0

Configure the interface:

/sbin/ifconfig eth0 192.168.5.240 netmask 255.255.255.0 up

Configure the routing to the gateway:

/sbin/route add default gw 192.168.5.240 eth0

Configuring the network interface and routing by using the startup scripts.

Static IP address configuration on Debian in /etc/network/interfaces

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
address 192.168.5.18
netmask 255.255.255.0
gateway 192.168.5.240

Dynamic (DHCP) configuration on Debian:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

For the name resolution, configure /etc/hosts, /etc/resolv.conf, /etc/nsswitch.conf

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