How to Schedule a Comand in Linux?

For some time i had been using reaver to crack some WEP'S.Some routers are pre configured to recognise a bruteforce attack and blocks the mac address from doing further bruteforce say for some like 10 attempts.The router also recognises the MAC address and just blocking it from sending further requests.So,what i feel can be done is by changing the mac address after a specific time using the following command by just simply typing,

macchanger -r myinterface

I just want to run this command every one minute so that the required no of attempts complets within that time or else just run this command every time the warning comes occurs in the reaver terminal.how can i schedule this command using any tool or using any other linux command??