I used to find it annoying not able to open certain files using the command line as different apps open different programs.
I noticed that there’s a command “gnome-open” for gnome folks, which opens the files using the default handler (evince, eye of gnome, etc) and works with pretty much all files, folders, etc
Even better, created a bash alias for the same(put alias go=”gnome-open” in your .bashrc) and I can just “go” anywhere I please.

op’;l’;l’;l’;l’;l
xdg-open is the thing to use if you want something portable; it invokes either gnome-open or the kde equivalent, as appropriate.
Hey yeah. It does work
I actually noticed that I have no images, and all my music is managed by a player. So much for the “go” alias.
In my case, “go” is a small shell-script instead of an alias. It can open not only files/URLs with the preferred application, but programs in a detached window as well. Similar to the Windows “start” command. http://linux.subogero.com/?page_id=153