A few doubts,
Copy files from folder to which we have installed ?
The github repo, so you'd have a folder called nodebb with all of the nodebb files in, then a folder called nodebb2, which also contains all the nodebb files.
Share the command to change port no. please..
./nodebb setup, but change :4567 to something else.
How to assign new folder / installation to database 2 ?
You answered this in your next post, change the 0 in database to 1.
Should we run ./nodebb setup after copying the files ( installed ? ) to a new folder ?
You will need to yes in order to set it up, you'll also need to run npm install to get the dependencies installed in that location.