'Failed to unlink socket file" error in MongoDB 3.0

Question

I am new to MongoDB. I am trying to install MongoDb 3.0 on Ubuntu 13.0 LTS, which is a VM on Windows 7 Host. I have installed MongoDB successfully (packages etc.), but when

Answer 1

$ sudo mongod

it solve problem for me

Answer 2

Manually restarting mongod service after restart fixed the problem.

Long-term solution was to add static host name, instead of ip address 'net' part of mongod.conf file (I suspect the problem is that ip address is not yet given to server, when mongod servis starts).