ON INSERT => execute AWK/SH/EXE?

["Bima Djaloeis" <bima.djaloeis.uni@xxxxxxxxxxxxxx>]

Hi there,

I am new to PostgreSQL, is it possible to create something so that

1) If I insert / update / delete an item from my DB...
2) ... an awk / shell / external program is executed in my UNIX System?

If yes, how do I do this and if no, thanks for telling.

Thanks for reading, any help is appreciated.