[OS X TeX] PATH in Leopard

[Alain Matthes]

Hello

AlterMundus:~ ego$ $PATH gives this

-bash: /usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:
/usr/X11/bin:/usr/local/bin:/usr/texbin: No such file or directory


Why this warning  "such file or directory" perhaps : at the end ?
because all the directories exist.

Now I have a file paths in /etc

paths : the contents are

/usr/bin
/bin
/usr/sbin
/sbin
/usr/local/bin

and a directory paths.d

With a file X11

/usr/X11/bin

etc/paths and directory /etc/paths.d are described as the places where  
search path action takes place now.

Does anybody know where important UNIX stuff like this is explained ?

Thanks Alain