Hydra Brute Force Attack on Metasploitable 2 & 3

In each of the metasploitable virtual machine, we add new user “cyberraf” with a weak (easy-to-guess) password “chloe” The commands are the following:
sudo adduser cyberraf ← creates new user with username “cyberraf”
We are prompted to enter password, we type “chloe” (which is a password found in /usr/share/wordlists/rockyou.txt.gz )