According to MongoDB Backup manual, mongodump is a very handy tools for MongoDB administrator to backup and restore full mongodb cluster or single database or single collection.
mongodump usage
Here is a very simple command to take backup or restore mongodb system.
Backup
sudo mongodump --host hostName -d databaseName --port portNumber --username userName --password passWord --out directoryLocation
with the above command you can take backup of your database. I don’t need to explain all parameters as I wrote variable name very clearly.
Restore
sudo mongorestore --host hostName -d databaseName --port portNumber --username userName --password passWord backupSourceLocation I guess it will help you quickly.