I am having MongoDB and Robomongo in my running system, I am using Robomongo as client, I have installed MongoDB on different system which I am treating as server, I want to
First you have to run mongod command in your terminal make sure the command execute properly.
mongod
Then in new terminal tab run mongo command.
mongo
Then open Robomongo GUI and create a new connection with default setting.
Hopefully this will solve your problem
Cheers !!