basic commands of router

To change user mode to privilege mode

Router> en or enable

To change enable mode to configuration mode

Router# conf t or configure terminal

To change configuration mode to interface mode

Router(config)# int f0/0 or interface fastethernet 0/0

Router(config-if)# exit

Router(config)# 

            Or

Router(config-if)#end

To change configuration mode to line interactive mode

Router(config)#line c 0

To check the running configuration of router (RAM)

Router# sh run or show running-config

To check the saved configuration of router (NVRAM)

Router#sh start or show startup-config

To check flash

Router#sh flash

To check interface status of router

Router#sh ip int brief

To check date & time of router

Router#sh clock

To set date & time of router

Router#clock set 10:21:00 Jan 3 2014

To check the hardware, software versions & router run time

Router#sh ver

To check login details

Router#sh users or sh line

To check router routing table

Router#sh ip route

To set hostname on router

Router#conf t

Router(config)#hostname R1

To remove hostname

R1(config)#no hostname

To run enable mode command on configuration mode

Router(config)#do sh ip int brief

To set login message on router

Router(config)#banner motd  "welcome to cisco world"

To set time zone of router

Router(config)#clock timezone GMT 23

Router(config)#exit

To save configuration

Router#write

            Or

Router#copy run start