Open a directory in a Linux GUI file browser via the command line
Solution 1:
In Gnome you can do
nautilus . &
The dot means current directory, and the & runs the process in the background so you can continue to use your terminal (and ctrl+c won't kill the browser).
Solution 2:
xdg-open . This alone should do the trick if you want to open the current directory, else try xdg-open /path.