How to execute a privilege mode command on configuration mode in Router

When we execute a privilege command like show, clear commands on global mode of router .Then it show an error message

Router(config)#show ip int

                ^

% Invalid input detected at '^' marker.

Router(config)#

To solve out this problem do command it used to execute privilege commands on global mode.

Router(config)#do show ip int brief

Interface              IP-Address      OK? Method Status                Protocol

FastEthernet0/0        10.1.1.1        YES manual up                    down

FastEthernet0/1        unassigned      YES unset  administratively down down

Vlan1                  unassigned      YES unset  administratively down down

Router(config)#

For Further Reading,

General, How To, Networking