The default sudoers file gives one group of users full control over your machine: %wheel ALL=(ALL) ALL Once it is not just you and your best friend administering a machine, you will start to give more fine-grained privileges to administrators. All fields in the above configuration line can be replaced by a list of values. A list of user names, a list of host names, a list of commands, and so on. Soon you will copy and paste these lists around in your sudoers file. It looks simple and manageab...