The path that you are exercising to the binary of most commands is
revealed by the command "which".
For example, "which evolution" returns "/usr/bin/evolution".
I find the whereis command helpful too, as it gives the locations of the package's man pages, config files, binaries, libraries, etc.:
user@host:~$ whereis firefox
firefox: /usr/bin/firefox /etc/firefox /usr/lib/firefox /usr/bin/X11/firefox /usr/share/firefox /usr/share/man/man1/firefox.1.gz
--
Dylan
Type faster. Use Dvorak:
http://dvzine.org