Step 1
$ mongodump
--username {username}
--password {password}
--authenticationDatabase admin
--db {dbname} // has to be specified or it will throw authentication error since not every db has the same authentication
Then, you can get the backup files in ~/dump/{dbname}
Step 2, how to convert bson to human-readable json
$ bsondump --pretty
--outFile collection.json collection.bson
Step 3, restore backup data
$ mongorestore
rsync -avz root@cowpte.com:/root/dump/mnpte_test /Users/workmac/documents/work-web-nginx/sample-reactjs/mnpte_test