Eko Budi Setiyo <contact_us / haltebis.com> writes: > Is it possible for ruby to find out what is the pdf reader application > installed in the target Computer In Linux/UNIX? Generally no, unless you know distribution & installation specific information. But do try the program "see". It comes from the same package that provides /etc/mailcap, and so it should be quite common. Other than that, allow users to specify their own pdf reader. YS.