Migration Drush commands are fairly straightforward. The three most commonly used commands are: migrate-status (ms), migrate-import (mi), and migrate-rollback (mr). Migrate-status shows you which migrations have been registered, how much content is in the source site, and how many pages of each type have been migrated over. Migrate-import actually migrates the content from the source to the destination, and migrate-rollback deletes content from the destination. For more information on Drush’s migration commands, type the command

drush @alias help --filter=migrate

for information on each command, and other available commands.