Greetings Everyone!

So today I actually encountered an error while setting up my nodebb system. The problem was with mongodb! When I started the system using sudo systemctl start mongodb it shows an message as *Faild to start mongodb.service: Unit mongodb service is not loaded properly: Bad Message*.

And when using commands sudo systemctl status mongodb ill post the error logs as an image and it is into two parts as an image below

http://i.imgur.com/U77wTVz.jpg

http://i.imgur.com/DlJQdwk.jpg

I need help with this my system is on Ubuntu 16.04.2!

Thanks to those who help!
Kind Regards,
/shar