Quick notes on Drush, while on a Drupal installation folder:
To create an archive of the current Drupal site:
drush archive-dump --destination=/backups/mysite.tar
To restore the files and databases for all sites in the archive.
drush archive-restore /backups/mysite.tar
To create a mysql dump of the current Drupal database:
drush sql-dump --result-file=
/mydb.sql
To drop all tables of the current Drupal database:
drush sql-drop
To import a new db file in the current Drupal database: