I just sorted this out myself so thought I would write down how I did it, which is specifically relevant to what Suan asked.
These steps allow you just type "open " and not your terminal covered in messages you don't need:
Create a script called open
in ~/bin
, the content is just:
xdg-open "$1" &> /dev/null &
Save and close the script, then type "source .profile" (or .bash_profile if relevant).
Thats it so typing "open Music" will open your music folder in the nautilus GUI and shouldn't enter anything onto your terminal.