How can I change gnome terminal font in command line?
I know how to change gnome's terminal font using the gui 
But I would like to do the same using the terminal (automated way). How can I do that ?
I have just found out that I can do this with gconftool-2, e.g. :
gconftool-2 --set /apps/gnome-terminal/profiles/Default/font --type string "Ubuntu Mono derivative Powerline 11"
To also uncheck the Use the system fixed width font checkbox from the command line, use:
gconftool-2 --set /apps/gnome-terminal/profiles/Default/use_system_font --type=boolean false
Tested on Linux Mint Cinnamon 17.1. Your mileage may vary.