Role-based CLI Configuration :

Step1)active aaa
(config)# aaa new model

Step2) Set enable secret
(Config)# enable secret <num>

Step3) create root view
# enable view
Pass: <enable secret pass>

Step4) create view
(Config)# parser view <name>
(Config-view)# secret <num>
(Config-view)# commands <mode> include <name>

Login by parser view created :
# enable view <name>
Pass : <num>

PARSER-6-VIEW_SWITCH: successfully set to view

How to stop a command - make it stop running (such as ping) :

Hold down ——> Cntrl+shift+6