(idiomatic) An informal greeting, not requiring a literal response. In form a question, and thus followed by a question mark. Typical responses include:
I'm very well, thank you. How are you? (formal)I'm fine, thank you. / Fine, thanks. (informal) / Fine, and you? (informal)
(idiomatic, Ireland) (Following a noun phrase; stress on are) An expression of derision, that the preceding referent is unworthy of the name. In form an exclamation, and thus often followed by an exclamation mark.
2013 December 31, “'Christmas how are you! We'll remember this one for a while'"”, in Gorey Guardian:'Christmas how are you!' exclaimed Jim O'Hanlon ruefully. 'We will remember this one for quite a while anyway.' He was grateful that at least no one was injured in the incident.
Source: en.wiktionary.orgAs a musician, how are you coping with the lockdown? Source: Internet
“And I thought if he was not willing to trust me with this information, how are you trusting me to go guard such a sensitive location, I didn’t want to go through with it.” Source: Internet
At the end of that, it’s going to have a computer in it somewhere, and all of the systems are going to be controlled by a computer somewhere, so if we’re thinking, “Okay, so how are you going to embed security into that from the very get-go?” Source: Internet
But how are you going to learn your own body when you don’t test yourself. Source: Internet
'Dad, how are you doing?' Source: Internet
"Hello Diego (Maradona), how are you? Source: Internet