Formal:
* Bonu die! (Good day!) - This is a very common greeting, similar to "Good morning" or "Good afternoon".
* Bonu dì! (Good day!) - This is another variation of the formal greeting.
Informal:
* Ciao! (Hello!) - This is a very casual greeting that can be used with friends and family.
* Bonu! (Good!) - This is a more informal greeting that can be used with people you know well.
* Bonu a ti! (Good to you!) - This is a slightly more formal variation of "Bonu!".
* Bonu a vus! (Good to you all!) - This is a polite greeting that can be used when addressing a group of people.
Other options:
* Bonu serata! (Good evening!)
* Bonu notte! (Good night!)
Note: Sardinians often use Italian greetings as well, such as "Buongiorno" or "Ciao".