Additional info:

"Здравствуй" (zdrUH-stvoo-y) is used if you use the pronoun "ты" talking to that person.

"Здравствуйте"(zdrUH-stvoo-y-tye) - for the pronoun "Вы/вы".

You can learn more about the pronouns here.

Additional info:

"Как дела?" (kUhk dye-lUH). 

The literal meaning of the question is "What are (your) businesses" :).

But we ask this questions only if we know the person. If you see that person for the first time, you shouldn't ask "Как дела?" :).

Additional info:

"Что нового?" (shtOH nOH-vuh-vuh). The literal meaning is "What's new?".

Additional info:

"Хорошо. А у Вас?" (huh-ruh-shOH. uh oo vAHs) - If you use "Вы" talking to the person.

"Хорошо. А у тебя?" (huh-ruh-shOH. uh oo tye-bYA) - if you use "ты" talking to the person.

The difference between "Вы" and "ты" is explained here.

Additional info:

"Всё в порядке" (fsYO f puh-rYAt-kye). The meaning is "Everything is OK".

"Всё хорошо" (fsYO huh-ruh-sOH). The meaning is "Everything is good".