mongodb service not started
==> check /var/log/mongodb and /var/lib/mongodb for mongondb with (user==>mongodb) and the permissions.
sudo mkdir /var/log/mongodb
sudo chown -R mongodb:mongodb /var/lib/mongodb
sudo chown mongodb /var/log/mongodb
sudo chown mongodb:mongodb /tmp/mongodb-27017.sock
sudo service mongod restart
sudo service mongod status