Solution for 403-Forbidden Issue

403 error usually refer to incorrect setting in .htaccess or incorrect read right permission with the project folder.

There is a possible happen due to incorrect alias of folder too. So, go to /var/www/html and use the following command to check folder's alias:

ll -Z

To change folder alias, use the following code

chcon -R -t httpd_sys_content_t foldername

Linux Command of Backup DB and Compress Files

Export:

mysqldump -u root -p --all-databases > alldb.sql

Look up the documentation for mysqldump. You may want to use some of the options mentioned in comments:

mysqldump -u root -p --opt --all-databases > alldb.sql
mysqldump -u root -p --all-databases --skip-lock-tables > alldb.sql

Import:

mysql -u root -p < alldb.sql

LINUX Command COPY FILE

You can do this with the scp command. scp uses the SSH protocol to copy files across system by extending the syntax of cp.

Copy something from this system to some other system:

scp /path/to/local/file username@hostname:/path/to/remote/file          

Copy something from some system to some other system:

scp username1@hostname1:/path/to/file username2@hostname2:/path/to/other/file   

Copy something from another system to this system:

scp username@hostname:/path/to/remote/file /path/to/local/file

Step by Step Setup Ubuntu Server and LAMP Workstation Package

Chapter 1: How to Create Bootable Ubuntu USB Flash Drive 

1. Prepare a USB Flash Drive at least 2GB free space. 
2. Download Universal-USB-Installer
3. Go to http://releases.ubuntu.com/ and download latest version of Ubuntu iso file.
4. Go to this guide and install image into USB Flash Drive.
5. Once finished loaded the image, you can use it as bootable drive.

Chapter 2: How to Setup LAMP Workstation Package

1. To install LAMP, run this command at a terminal:

sudo apt-get install apache2 php5 php5-mysql php5-gd mysql-server

2. To install optional extensions, run this command at a terminal:

sudo apt-get install php5-curl php5-imagick phpmyadmin mysql-workbench php5-cli php5-mcrypt php5-ffmpeg

3. Enable apache modules:

sudo a2enmod vhost_alias rewrite

4. To enable openSSH (allowed putty access from other terminal)

sudo apt-get install openssh-server

5. To Share Folder Between Windows and Ubuntu
sudo mkdir /mnt/hgfs
sudo vmhgfs-fuse .host:/ /mnt/ -o allow_other -o uid=1000

---- outdated ---
You will find directory path /mnt/hgfs if successfully mount, otherwise you have to follow below command to resolved the issue.

sudo vmware-config-tools.pl

or 

$ git clone https://github.com/rasa/vmware-tools-patches.git
$ cd vmware-tools-patches
$ ./patched-open-vm-tools.sh
-----------------


Chapter 3: How to Configure Vhost

1. Configure apache webserver access to your workspace and a catch-all vhost by adding the following to /etc/apache2/httpd.conf:
Copy the following snippet into httpd.conf

<Directory "/var/www/vhosts/">
        Options FollowSymLinks
        AllowOverride All

        Order allow,deny
        Allow from all

</Directory>

NameVirtualHost *
ServerName localhost

Add below to allow perl script or cgi script to be executed

<Directory "var/www/your-cgi-bin-path">

    Options ExecCGI

    AddHandler cgi-script .cgi .pl

</Directory>

Create vhosts folder:
sudo mkdir /var/www/vhosts

If you can't save the httpd.conf, you should be editing it as a user with root permissions - i.e. something like

sudo nano /etc/apache2/httpd.conf

Chapter 4: How to Setup Multisite in Vhost

1. Configure a vhost for each sites by creating a file in /etc/apache2/sites-available as shown below and by updating the file /etc/hosts

Save the following as /etc/apache2/sites-available/001-site1.conf:

<VirtualHost *>
        ServerName site1.com
        ServerAlias dev.site1.com
        DocumentRoot /var/www/vhosts/dev.site1.com
</VirtualHost>

Then edit the file /etc/hosts and add this line at the top:

127.0.0.1       site1.com

2. Enable each vhosts site as needed (definitely the first three lines):

sudo a2dissite default
sudo a2ensite sites1.com

*specify full path of config file if sites not found

sudo a2ensite /etc/apache2/sites-available/xxxx.conf

3. Restart Apache:

sudo service apache2 restart

4. Check your ubuntu IP with following comand
ifconfig

4. Go back to window and edit file C:\Windows\System32\drivers\etc\hosts with following line
192.168.122.1 dev.site1.com

References:

https://groups.drupal.org/node/6266

https://help.ubuntu.com/community/SSH/OpenSSH/Configuring
https://xpressubuntu.wordpress.com/2015/05/11/resolving-no-shared-folders-with-vmware-player-7-and-ubuntu-15-04-guest/comment-page-1/#comment-708
https://phpraxis.wordpress.com/2016/05/16/install-php-5-6-or-5-5-in-ubuntu-16-04-lts-xenial-xerus/
https://superuser.com/questions/1072317/vmware-tools-for-ubuntu-16-04-lts-xenial
https://ericsysmin.com/2017/05/24/allow-hgfs-mount-on-open-vm-tools/

Drupal 7: Set Default Image to Content with Update Hook

Here is the update hook to add default image to article content:

/**
 * Update default image on field base.
 */
function mymodule_update_7300() {
  $field_name = 'field_fb_article_image';
  $filename = 'images.png';
  $source = drupal_get_path('module', 'mymodule') . '/includes/images' . '/' . $filename;

  // Load field info.
  $field = field_info_field($field_name);

  // Create new file object and get new fid.
  if (file_exists($source)) {
    $file = new stdClass;
    $file->filename = $filename;
    $file->timestamp = REQUEST_TIME;
    $file->uri = $source;
    $file->filemime = file_get_mimetype($source);
    $file->uid = 1;
    $file->status = 1;
    $file = file_copy($file, 'public://files', FILE_EXISTS_REPLACE);
    $fid = $file->fid;

    // Replace old fid with new fid.
    $field['settings']['default_image'] = (string) $fid;

    // Update field.
    field_update_field($field);
  }

}

Drupal 7: How to create update hook

Step 1: Go to the following path and create update hook to perform the action.

sites/all/modules/custom/mymodule/mymodule.install

/**
 * Disabled PSL Newsletter module
 * Implements hook_update_N()
 */
function mymodule_update_7300(&$sandbox) {
   module_disable(array('newsletter'));
   return 'Newsletter has been disabled';
}

Step 2: Go to project root path and run drush updb -y

Drupal 7: Calling Session Variable with Javascript

Step 1: Prepare hook menu to call getSession function. Return the $result variable after this line $result = $_SESSION['_custom_variables'];

sites/all/modules/custom/mymodule/mymodule.module

/** Comment **/ 
/**
 * Implements hook_menu().
 */
function mymodule_menu() {
  // track url
  $items['getSession'] = array(
    'page callback'    => 'mymodule_getSession_ajax',
    'access callback' => TRUE
  );

  return $items;
}

/**
 * Called by ajax request to getSession
 */
function mymodule_getSession_ajax() {
  if(isset($_POST['action'])) {
    $action = $_POST['action'];
    unset($_POST['action']);
  }
  else {
    $action = 'default';
  }

  mymodule_getSession('ajax', $action, $_POST);
}

/**
 *
 * @param string $type ajax|server This informs the function if it should use the current request or REFERER as the url
 * @param string $action action to send
 * @param array $vars Associative array of variables to send as custom vars
 */
function mymodule_getSession($type, $action, $vars=array()){
  $url = $_SERVER['HTTP_REFERER'];
  $params = parse_url($url);

  $result = array();

  $customVariable = ['MemberID', 'EmailID', 'SpecialtyID'];

  if(isset($params['query'])){
    parse_str($params['query'], $query);

    foreach ($query as $key => $value) {
      if(in_array($key, $customVariable))
      {
        $_SESSION['_custom_variables'][$key] = $value;
      }
    }
  }
  $result = $_SESSION['_custom_variables'];

  print drupal_json_output($result);
  exit();
}

Step 2: Call hook menu with ajax, return the result after success call.

sites/all/themes/mytheme/js/mytheme.js

/** Comment **/ 
(function ($) {
jQuery(document).ready(function() {
  var mysession = getSession(); 

  console.log(mysession);

/*
   * Get Session Function
   * @action is the name of the page
   * @actionType is either 'page_view' or 'link'
   */
  function getSession() {
    // add action and action type
    var data = {action:'custom_variables'};
    var basePath = '';
    var result;
    if ( (Drupal.settings.basePath != undefined) && (Drupal.settings.basePath != '/') ) {
      basePath = Drupal.settings.basePath;
    }
    basePath = basePath + '/getSession';
    basePath = basePath.replace('//', '/');
    jQuery.ajax({
      url: basePath,
      type:'POST',
      dataType:'json',
      data:data,
      async:(jQuery.browser.safari || jQuery.browser.mozilla) ? false : true,
      success: function(data) {
        // for this current implementation, there is no need for action upon success
        result = data;
        },
      error: function(xhr, status, error) {
        // error
      }
    });
    return result;
  }
})
}
)(jQuery);