How did you install dosbox?
It should be in
Code:
repo@cannabis ~]$ whereis dosbox
dosbox: /usr/bin/dosbox /usr/X11R6/bin/dosbox /usr/bin/X11/dosbox /usr/X11/bin/dosbox /usr/man/man1/dosbox.1.gz /usr/share/man/man1/dosbox.1.gz /usr/X11/man/man1/dosbox.1.gz
repo@cannabis ~]$
or in the system subgroup from your menus