How do you say hello man in portuguese?

There's no direct equivalent of "hello man" in Portuguese that carries the same casual and friendly tone. Here's why and how to say it depending on the context:

Formal:

* "Olá, senhor." (Hello, sir.) This is appropriate for someone you don't know well or for an older person.

Informal:

* "E aí, cara?" (What's up, man?) This is a very common and casual greeting among friends.

* "Oi, mano?" (Hey, man?) This is another informal greeting. "Mano" can be a more familiar term, especially for close friends.

Other options:

* "Olá, amigo." (Hello, friend.) This is a more formal way to address someone you consider a friend.

* "Oi, meu chapa!" (Hey, buddy!) This is a very informal and friendly way to greet someone.

Important note: While "man" is a common term in English, it can be considered somewhat rude in Portuguese. The most common ways to express "man" in Portuguese are "cara," "mano," and "chapa," all of which are informal and should only be used with people you know well.