title: How to show one category of posts on one page in Wordpress?
body: <p>I am fairly new to wordpress and trying to use the Pinboard theme. I have created different pages and I want to show posts belonging to one category on each page. Although, it seems like a pretty common question I am still not able to understand how to do it exactly. </p>
  
  <p>I assume that I have to write this code somewhere:- </p>
  
  <p>query_posts( array ( 'category_name' => 'my-category-slug', 'posts_per_page' => -1 ) );</p>
  
  <p>But, I don't know which file/location should I put it in, and if I need any plugins for this to work.</p>