I want to know this mainly because im having trouble with Mplayer, an app which i installed from package.

i also want to know this because i installed firefox, it works fine, but i want to find its "icon" so i can put it up on my xfce toolbar.

if you guys know, please tell me.

you can open the package with ark, or open the file in /var/log/packages
with kwrite or so.
they both will give you a list of files.

to put an icon on the desktop, right click on it (-->add-->link to app )

egag

You could just try #slocate mplayer or #slocate firefox. If you've never used slocate or locate before you'll need to run as root #updatedb -u -e /mnt. This will create an index of all the files in your file system starting from / and excluding the /mnt directory. To refine the search further, try #locate firefox | less, then you can search the results more specifically for what you're looking for.

Unfortunately, installing in linux isn't like installing in windows. Files sorta land all over the place, and it depends on the choice of the package maintainer exactly where they land. Binaries will land in /usr/bin or /usr/share/bin or /usr/local/bin or... And then there are libraries that will land in /usr/lib or similar paths. So there's no really easy answer to your question.

Ok, I guess maybe there is an easy way to find the answer to your question.

can't find something? use slocate
first:
updatedb (wait a minute)
slocate mplayer (for example).

too many results and they just scroll by?
slocate mplayer | more (or 'less' if you want)

also works with wildcards:
slocate mplay*

If you have multiple drives like I do, I use "updatedb -e /mnt " so it doesn't search
in the /mnt/ directory and add those files to the database.

-tw