How to open aws server in Linux local system by ppk or pem file

1. Requirement : .ppk or .pem key file
2. If you have .ppk file. It is required to change it to .pem file as it is the key format supported by Linux.
You need putty tools for generating .pem file from .ppk.
Install putty tools : sudo apt-get install putty-tools
Go to the directory of the .ppk file and run the following command : puttygen [filename].ppk -O private-openssh -o [filename].pem
3. Now you have the .pem file. It is needed to be added to the linux known hosts.
Run the following command : ssh-add [filename].pem
4. Now connect to AWS using linux in built 'Connect to Server' -> Type(SSH). You don't need to add password. 

how to remove estimate shipping and tax in magento 2

checkout_cart_index.xml
<referenceBlock name="checkout.cart.shipping">
<arguments>
<argument name="jsLayout" xsi:type="array">
<item name="components" xsi:type="array">
<item name="block-summary" xsi:type="array">

<!-- My custom part: -->
<item name="config" xsi:type="array">
<item name="componentDisabled" xsi:type="boolean">true</item>
</item>

</item>
</item>
</argument>
</arguments>
</referenceBlock>



===================================
cart/shipping.phtml

<div class="title" data-role="title">
    <strong id="block-shipping-heading" role="heading" aria-level="2">
        <?php / @escapeNotVerified / echo $block->getQuote()->isVirtual() ? _('Estimate Tax') : _('Estimate Shipping and Tax') ?>
    </strong>
</div>

How to upgrade magento 2.X to 2.X?

Step 1: Access Your Server via SSH

You need to connect your server via SSH.

Step 2: Navigate to the Magento 2 Root Directory

Once your SSH connection is up, you will need to move to your target application folder. In that application folder, you will find the public_html folder which is the root directory of Magento 2.

Step 3: Upgrade Commands

composer require magento/product-community-edition 2.1.9 --no-update

composer update
rm -rf var/di var/generation
php bin/magento setup:upgrade
php bin/magento setup:di:compile
php bin/magento setup:static-content:deploy
php bin/magento cache:clean
php bin/magento cache:flush
php bin/magento indexer:reindex

How to make auto select first child product of configurable product in magento2?

Override this file to your theme:
vendor/magento/module-configurable-product/view/frontend/web/js/configurable.js

your theme file location will be:
app/design/frontend/[vendor]/[theme]/Magento_ConfigurableProduct/web/js/configurable.js

_fillSelect: function (element) {
    var attributeId = element.id.replace(/[a-z]*/, ''),
        options = this._getAttributeOptions(attributeId),
        prevConfig,
        index = 1,
        allowedProducts,
        i,
        j;

    this._clearSelect(element);
    element.options[0] = new Option('', '');
    element.options[0].innerHTML = this.options.spConfig.chooseText;
    prevConfig = false;

    if (element.prevSetting) {
        prevConfig = element.prevSetting.options[element.prevSetting.selectedIndex];
    }

    if (options) {
        for (i = 0; i < options.length; i++) {
            allowedProducts = [];
            if (prevConfig) {
                for (j = 0; j < options[i].products.length; j++) {
                    // prevConfig.config can be undefined
                    if (prevConfig.config &&
                        prevConfig.config.allowedProducts &&
                        prevConfig.config.allowedProducts.indexOf(options[i].products[j]) > -1) {
                        allowedProducts.push(options[i].products[j]);
                    }
                }
            } else {
                allowedProducts = options[i].products.slice(0);
            }

            if (allowedProducts.length > 0) {
                options[i].allowedProducts = allowedProducts;
                element.options[index] = new Option(this._getOptionLabel(options[i]), options[i].id);
                if (typeof options[i].price !== 'undefined') {
                    element.options[index].setAttribute('price', options[i].prices);
                }

                element.options[index].config = options[i];




                index++;
            }
            // Code added to select option
            if (i == 0) {
                this.options.values[attributeId] = options[i].id;
            } 
        }
        //Code added to check if configurations are set in url and resets them if needed
        if (window.location.href.indexOf('#') !== -1) {this._parseQueryParams(window.location.href.substr(window.location.href.indexOf('#') + 1));}
    }

},

===================================================================
For Swatch: Override the below file to your theme

/module-swatches/view/frontend/web/js/SwatchRenderer.js

_RenderControls: function () {
    var $widget = this,
        container = this.element,
        classes = this.options.classes,
        chooseText = this.options.jsonConfig.chooseText,
        selectedArray = []; // Variable declation for autoselect element array

    $widget.optionsMap = {};

    $.each(this.options.jsonConfig.attributes, function () {
        var item = this,
            controlLabelId = 'option-label-' + item.code + '-' + item.id,
            options = $widget._RenderSwatchOptions(item, controlLabelId),
            select = $widget._RenderSwatchSelect(item, chooseText),
            input = $widget._RenderFormInput(item),
            listLabel = '',
            label = '';

        // Show only swatch controls
        if ($widget.options.onlySwatches && !$widget.options.jsonSwatchConfig.hasOwnProperty(item.id)) {
            return;
        }

        if ($widget.options.enableControlLabel) {
            label +=
                '<span id="' + controlLabelId + '" class="' + classes.attributeLabelClass + '">' +
                    item.label +
                '</span>' +
                '<span class="' + classes.attributeSelectedOptionLabelClass + '"></span>';
        }

        if ($widget.inProductList) {
            $widget.productForm.append(input);
            input = '';
            listLabel = 'aria-label="' + item.label + '"';
        } else {
            listLabel = 'aria-labelledby="' + controlLabelId + '"';
        }

        // Create new control
        container.append(
            '<div class="' + classes.attributeClass + ' ' + item.code + '" ' +
                 'attribute-code="' + item.code + '" ' +
                 'attribute-id="' + item.id + '">' +
                label +
                '<div aria-activedescendant="" ' +
                     'tabindex="0" ' +
                     'aria-invalid="false" ' +
                     'aria-required="true" ' +
                     'role="listbox" ' + listLabel +
                     'class="' + classes.attributeOptionsWrapper + ' clearfix">' +
                    options + select +
                '</div>' + input +
            '</div>'
        );

        $widget.optionsMap[item.id] = {};

        // Aggregate options array to hash (key => value)
        $.each(item.options, function () {
            if (this.products.length > 0) {
                $widget.optionsMap[item.id][this.id] = {
                    price: parseInt(
                        $widget.options.jsonConfig.optionPrices[this.products[0]].finalPrice.amount,
                        10
                    ),
                    products: this.products
                };
            }
        });
        //Create array for Autoselect swatch
        selectedArray.push($widget.element.find('[attribute-id=' + item.id + '] .swatch-option')[0]);
    });


    // Connect Tooltip
    container
        .find('[option-type="1"], [option-type="2"], [option-type="0"], [option-type="3"]')
        .SwatchRendererTooltip();

    // Hide all elements below more button
    $('.' + classes.moreButton).nextAll().hide();

    // Handle events like click or change
    $widget._EventListener();

    // Rewind options
    $widget._Rewind(container);

    //Emulate click on all swatches from Request
    $widget._EmulateSelected($.parseQuery());
    $widget._EmulateSelected($widget._getSelectedAttributes());

    //Trigger click for Autoselect first option swatch
    $.each(selectedArray, function () {
        if(this != undefined) this.click();
    });

},

How to create a new administrator account through SSH in Magento 2

php bin/magento admin:user:create --admin-user='ayurvuser' --admin-password='admin#123' --admin-email='admin@ytd.com' --admin-firstname='Test' --admin-lastname='Tester'

Magento 2 folder/file permissions command line

You should set as bellow recommended.

cd <your Magento install dir>

find . -type f -exec chmod 644 {} \;                        // 644 permission for files

find . -type d -exec chmod 755 {} \;                        // 755 permission for directory

find ./var -type d -exec chmod 777 {} \;                // 777 permission for var folder   

find ./pub/media -type d -exec chmod 777 {} \;

find ./pub/static -type d -exec chmod 777 {} \;

chmod 777 ./app/etc

chmod 644 ./app/etc/*.xml

chown -R :<web server group> .

How to get USPS Shipping API (Shipping price) with PHP

<?php
function USPSParcelRate($weight,$dest_zip,$origin_zip ,$pack_size="REGULAR",$userName,$servicecode) {
// =============== DON'T CHANGE BELOW THIS LINE API CALL===============
$url = "http://Production.ShippingAPIs.com/ShippingAPI.dll";
$ch = curl_init();
// set the target url
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HEADER, 1);
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
// parameters to post
curl_setopt($ch, CURLOPT_POST, 1);
$data = "API=RateV4&XML=<RateV4Request USERID=\"$userName\"><Package ID=\"1ST\"><Service>ALL</Service><ZipOrigination>$orig_zip</ZipOrigination><ZipDestination>$dest_zip</ZipDestination><Pounds>$weight</Pounds><Ounces>0</Ounces><Container/><Size>$pack_size</Size><Machinable>FALSE</Machinable></Package>
</RateV4Request>";
// send the POST values to USPS
curl_setopt($ch, CURLOPT_POSTFIELDS,$data);
$result=curl_exec ($ch);
$data = strstr($result, '<?');
// echo '<!-- '. $data. ' -->'; // Uncomment to show XML in comments
$xml_parser = xml_parser_create();
xml_parse_into_struct($xml_parser, $data, $vals, $index);
xml_parser_free($xml_parser);
$params = array();
$level = array();
foreach ($vals as $xml_elem) {
if ($xml_elem['type'] == 'open') {
if (array_key_exists('attributes',$xml_elem)) {
list($level[$xml_elem['level']],$extra) = array_values($xml_elem['attributes']);
} else {
$level[$xml_elem['level']] = $xml_elem['tag'];
}
}
if ($xml_elem['type'] == 'complete') {
$start_level = 1;
$php_stmt = '$params';
while($start_level < $xml_elem['level']) {
$php_stmt .= '[$level['.$start_level.']]';
$start_level++;
}
$php_stmt .= '[$xml_elem[\'tag\']] = $xml_elem[\'value\'];';
eval($php_stmt);
}
}
curl_close($ch);
// echo '<pre>'; print_r($params); echo'</pre>'; // Uncomment to see the full array
return $params['RATEV3RESPONSE']['1ST'][$servicecode]['RATE'];
}

$res = USPSParcelRate($weight,$dest_zip,$origin_zip ,"REGULAR",$userName,$servicecode);

echo "Price ".$res;
?>