using a cable modem and the configuration is shown below:

computer name : MPC
Workgroup:XZEROX
Computer description:XZEROX

TCP IP : 192.162.1.55
subnet : 255.255.255.0
gateway: 192.168.1.254

DNS CONFIGURATION
HOST: MPC DOMAIN: XZEROX
DNS SERVER SEARCH ORDER : 202.134.0.166 and 202.134.2.55

How do i setup internet in my linux box?

i assume 192.162.1.55 is your static ip given by your ISP (cable)

ifconfig eth0 192.162.1.55 netmask 255.255.255.0

then

route add -net default gw 192.168.1.254

then open /etc/resolv.conf and add the following lines;

nameserver 202.134.0.166
nameserver 202.134.2.55

Another way is
if you use redhat type setup and you will see network configuration menu..