Router>enable

Router#disable

Router>

Router>?
...
Router>show ?
...
Router>show r?
...
Router>en

Router#show r?
...    

Router#show version
...
Router#show interfaces
...
Router#show running-config
...

Router>enable

Router#configure terminal 

Router(config)#hostname router.corpX.un

router.corpX.un(config)#no hostname

Router(config)#do show run

Router(config)#exit

Router(config)#end

Router#disable

Router>

Router#show running-config interface FastEthernet 0/0
...
Router#sh run int f0/0
...

Router#show running-config
...
/

Router#show running-config | inc int
...

Router#show interfaces | inc line
...

Router#show running-config | begin vty
...