Which languages should be learnt for hacking?

Python, Perl, Ruby, Javascript, C, C++, Client-Side Web-App languages.

 HTML, CSS, PHP, Angular JS, JavaScript, Python, C, C++, 

I advice you bash then python

For a Hacker Python is Best

html

c/c++

python

java

perl

sql

php

lisp

assembly language

you should learn c and c++