How to export all collections in MongoDB?

Question

I want to export all collections in MongoDB by the command:

mongoexport -d dbname -o Mongo.json

The result is:
No collection specifie

Answer 1

Exporting all collections using mongodump use the following command

mongodump -d database_name -o directory_to_store_dumps

To restore use this command

mongorestore -d database_name directory_backup_where_mongodb_tobe_restored