Magento2

you need to disable all these modules 

Magento include a base .gitignore file with the Magento Open Source project repository. See the latest Magento .gitignore file. If you need to add a file that is in the .gitignore list, you can use the -f (force) option when staging a commit:

Nice and clean one 

Add the following line to your CSS file:

.opc-summary-wrapper{

    display:none;

}

Goto following directory

vendor/magento/module-checkout/view/frontend/web/js/model

And open the file step-navigator.js

Copy this file to your working theme directory.

Edit the function getActiveItemIndex in step-navigator.js You will get 0,1 etc when console.log(activeIndex);

In Magento 2, a lot work has been done in improving the response time and Sections are a part of it. Magento sets customer related data in local storage of browser in key value pair. Each key is known as section. In this post we will what sections we can update 

We can use all below sections in system.xml file 

go to this file

/Magento/Framework/View/Element/Template/File/Validator.php

replace this part

foreach ($directories as $directory) {
    if (0 === strpos($realPath, $directory)) {

with the following one:

$isWin = 'WIN' === strtoupper(substr(PHP_OS, 0, 3)); 

/** @var bool $isWin */ 
foreach ($directories as $directory) { 
    if (0 === strpos($realPath, !$isWin ? $directory : $this->fileDriver->getRealPath($directory)) ) {

Original article 

How to Add Admin User via Command Line

php bin/magento admin:user:create --admin-user=wikicode  --admin-password=WiKiLoveMagento [email protected] --admin-firstname=Wiki  --admin-lastname=Code

the best way to do do this is using the below method

$objectManager =   \Magento\Framework\App\ObjectManager::getInstance();
$productR =      $objectManager ->create('\Magento\Catalog\Api\ProductRepositoryInterface');
$product = $productR->get('product_sku');
$product->cleanCache();
$this->_eventManager->dispatch('clean_cache_by_tags', ['object' => $product]);

you need of course to follow the DI to implement this code, I just used this quick way to make it easy to understand

Using Object Manager

$storeManager = $objectManager->get('\Magento\Store\Model\StoreManagerInterface');
$websiteId = $storeManager->getStore()->getWebsiteId();
 
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$customerRepository = $objectManager->create('Magento\Customer\Api\CustomerRepositoryInterface');
 
// load customer info by email
$customer = $customerRepository->get('[email protected]', $websiteId);
 
// load customer info by id    
$customer = $customerRepository->getById(1);
 
// Update customer Info
$cust