Posts on page by category

https://codex.www.ads-software.com/Pages#Page_Templates

start with the code from index.php (depending on your theme) and use that as a starting point for a page template; then add a query before the start of the loop
https://codex.www.ads-software.com/Function_Reference/query_posts

Why not to use WordPress built-in links to category pages?

So alchymyth what I have to do is duplicate the index.php (page template) and then add a query before the loop?

Oleg Dudkin what you mean by that? Sorry but I don’t know what you’re suggesting, it’s the first time I work with wordpress.

duplicate index.php and save as catposts-page-template.php (example only, use your own rememberable file name)

then add the neccessary lines at the top of that file; example:

<?php
/*
Template Name: Category Posts Template
*/
?>

then create a query and add this before the line with ‘if(have_posts())’ (start of the loop https://codex.www.ads-software.com/The_Loop );
example:

<?php $args = array(
'category_name' => $post->post_name,
'paged' = get_query_var('paged')
);
query_posts( $args ); ?>

full set of possible query parameters: https://codex.www.ads-software.com/Class_Reference/WP_Query#Parameters

alchymyth thank you for your help.

I got the idea but I can’t make it work yet. The name of my category is Nutri??o and the URL is nutricao.
Can you give me a help on the code?
This is my nutricao-page-template.php

[code moderated - please use the pastebin for any code longer than 10 lines - see forum rules for posting code]

Here is the code: https://pastebin.com/ZCKjXGjM
Where and what exactly do I need do add about query?

You have 3 options:
1. Try to access https://your.site.com/category/nutricao – there should be category page with list of posts.

2. Add

<?php $args = array(
'category_name' => 'nutricao',
'paged' = get_query_var('paged')
);
query_posts( $args ); ?>

right after

<?php
/*
Template Name: Nutricao Posts Template
*/
?>

In this case you need 1 template for each category.

3. Similar as above, but use this code to insert.

<?php
global $posts;
$args = array(
'category_name' => $posts[0]->post_name,
'paged' = get_query_var('paged')
);
query_posts( $args ); ?>

In last case you need to name your page exactly like category is named. In your example – ‘nutricao’. But this template can be assigned to any number of pages.