how to change the define IP in linux

At command prompt type -  setup
Go to  – Network configuration
edit  – device
go to  – etho (etho) – Realtek semiconductor Co., Ltd
then hit enter and it will go to Devernet Configuration
Static Ip 172.100.151.46(here put the ip)
Netmask 255.255.255.0
default gateway Ip 172.100.151.1
then after saving all at command prompt
service network restart
then reboot there server