visudo nopasswd

$su

to key your root password

$visudo

modify like below:

## Allow root to run any commands anywhere

root ALL=(ALL) ALL

joe ALL=(ALL) NOPASSWD: ALL

## Allows members of the 'sys' group to run networking, software,

## service management apps and more.

# %sys ALL = NETWORKING, SOFTWARE, SERVICES, STORAGE, DELEGATING, PROCESSES, LOCATE, DRIVERS

## Allows people in group wheel to run all commands

# %wheel ALL=(ALL) ALL

## Same thing without a password

# %wheel ALL=(ALL) NOPASSWD: ALL