How to config root password

gistfile1.txt

###Type the following command:

sudo passwd

###The following message will appear:

[sudo] password for [username]: [Type your user password and press return]

###After that another message will appear, the following:

Type new UNIX password: [Type the root password you want]

###Now the last thing you need to do, the following:

Retype new UNIX password: [Retype the root password you chosen before]

###The following message will appear:

passwd: password updated successfully