Drush

Drush 9 is finally here with some much-awaited changes. Drush 9 commands are now classes and .inc files are obsolete. Drush commands will now be based on the Annotated Command format. This will change the fundamental structure of custom Drush commands.

When you remove a module manually or re import a database, some times you have a message like "The following module is missing from the file system...". this is due to deleted modules.

Drush allow to download and install drupal core, drupal modules and drupal themes.

Note : It is recommended to use composer to manage drupal 8, modules and themes.

To create a custom drush command, you must create a custom module like this (Here, mymodu

Methodes:

drush_invoke (For the current site)

drush_invoke($command, $arguments = array());



drush_invoke_process

This creates a new process in a new Drupal instance. There for you must specify the site alias.

Export Drupal 8 MySQL Database via Drush

drush cr

drush sql-dump > /pathto/mysql-dump-drupal8.sql

Features is a drupal contrib module enables the capture and management of features in Drupal, by providing a UI and API for taking different site building components from modules with exportables and bundling them together in a single feature module.

Site URL

1. Go to Administration > Configuration > Development > Performance

 (/admin/config/development/performance)

2. Click on "Clear all caches"

Example (basic)

drush migrate-upgrade --legacy-db-url=mysql://user:password@server/db --legacy-root=http://mydrupal6or7site.com

# Download latest stable release using the code below or browse to github.com/drush-ops/drush/releases.
# Example: drush 8.4.5
php -r readfile('https://github.com/drush-ops/drush/releases/download/8.4.5/drush.phar'); > drush
#OR