Switching to Root without Root Password

Hello Linux geeks, today I would like to share one trick with you that will always help you out when you need root access but you don't have it's password. Here I am considering that you know basic stuffs about root, administrator and normal user access/permissions. To get root access you know at least the administrator password, because this is not a hacking it's a ethical trick. So just follow the following basic steps to gain root access.