They are talking about what directories the system will look through for your executable program.
The trick here is to find out what your 'path' is. The command is 'echo $PATH' enter the command without quotes in a terminal.
Here is what my system returns.
Quote:
echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/games:/usr/lib64/java/bin:/usr/lib64/java/jre/bin:/usr/lib64/java/bin:/usr/lib64/kde4/libexec:/opt/kde3/lib64/qt3/bin:/opt/kde3/bin:/usr/lib64/qt/bin:/usr/share/texmf/bin:.
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So, if the executable is in /usr/local/bin or /usr/bin or /usr/games and the list goes on, the command will be found. If it is not in one of these directories, I can either update the path, or put a symlink in the path to the executable.
Hope this helps.