mongo dump json only code example
Example 1: mongoexport csv with query
mongoexport -d database -c collection --type=csv --out file.csv --fields name,fromHour,fromMin,toHour,toMin --query '{"_id":"56a647bff167043ad6ee49c0"}'
Example 2: how to export mongodb database to json
sudo mongoexport --db newdb -c restaurants --out newdbexport.json