After my new production server installation, I discovered I couldn’t run migrations:
$ ./yii migrate/up bash: ./yii: Permission denied
Adding execution permissions to ./yii resolved the problem:
$ chmod +x ./yii deploy@apps:/var/www/mp$ ./yii migrate/up Yii Migration Tool (based on Yii v2.0.8) No new migrations found. Your system is up-to-date.
Found via this comment.