MongoDb start status error - failed with result 'exit-code'. [Solved]

 sudo chown -R mongodb:mongodb /var/lib/mongodb 

sudo chown -R mongodb:mongodb /var/log/mongodb 

sudo systemctl restart mongod

sudo systemctl status mongod

source - https://stackoverflow.com/questions/37565758/mongodb-not-working-on-ubuntu-mongod-service-failed-with-result-exit-code

Error