baoyu@ubuntu:~$ sudo password root
sudo: password: command not found
baoyu@ubuntu:~$ sudo passwd root
Enter new UNIX password:
Retype new UNIX password:
passwd: password
updated successfully
baoyu@ubuntu:~$ sudo password root
sudo: password: command not found
baoyu@ubuntu:~$ sudo passwd root
Enter new UNIX password:
Retype new UNIX password:
passwd: password
updated successfully