Edit drushrc, site alias, and Drupal settings.php files.
drush core-config
filter : A substring for filtering the list of files. Omit this argument to choose from loaded files.
Pick from a list of config/alias/settings files. Open selected in editor.
drush core-config
Return to shell prompt as soon as the editor window opens.
drush --bg core-config
Edit the global configuration file.
drush core-config etc
Edit a particular alias file.
drush core-config demo.alia
Edit settings.php for the current Drupal site.
drush core-config sett
Edit the second file in the choice list.
drush core-config --choice=2