Backup, delete and restore collections
Backup the collection
mongodump --collection=collection-name --db=database-name
Creates a directory “dump”, which contains a folder with the db name. And this director contains the backup files of the collection. With “–out=” you can specify where you want the backup to be stored.
Delete the collection
> use database-name switched to db onews > db.collection-name.drop()
Restore the collection