A simple question on copy/paste

[Gordon Messmer]

Stephen Liu wrote:
> 
> What will be the simple way to copy and paste selected text/paragraph
> from .ps/.pdf file on text editor?
...
> The version of Acroread (Acrobat Reader) running on this box does not
> have text-selecting function.

Don't use Acroread, then.  Gnome, for instance, uses Evince by default.

> Saving technical documents on Internet is sometimes prohibitted.

By policy?  Technically, you save a document every time you open it from 
the internet, so that's pretty silly.  If you need to, reconfigure your 
browser so as to not use Acroread.