For the examples, here we use the module simple_analytics as example.
Module name : simple_analytics
Configuration object: simple_analytics.settings

Settings and mapping files structure.

Drupal 8 embedded with a configuration system which allow users to store variables in the database and usable in site wide as variables in drupal 7. Intend of use variable_set variable_get variable_del, in drupal 8 use Configuration API.

Note : Following examples are tested on FireFox Version 52.

Open Web browser console. F12

Method 1 . Press F12 and click on "Console"
Method 2 . Press Ctrl + Shift + K

All views templates can be overridden with a variety of names, using the view, the display ID of the view, the display type of the view, or some combination thereof.

Run cron by drush

drush cron

Add cron hook to a custom module.

/**
 * Implement hook_cron()
 */
function MYMODULE_cron() {
  // Your codes.
}