Chapter 1 - Lab 2 : error : No such a file

I did the right configuration as mentioned but i get the following error :
user@M103# mongod --config mongod.conf
Error reading config file: No such file or directory
try ‘mongod --help’ for more information

I get the same error even if i move to the /etc directory

see also attached file

You are running it from the wrong directory
You should not change the dir
Just open a new terminal and run mongod from there