You should read tutorials->PerlMonks for the Absolute Beginner and the links within, it'll teach you how to use this site better, including how to link to things. You don't say where you download perl from on this site, or where you are being instructed to call installperl. A google search for "installperl" finds no results for that domain, hardly surprising. The README file has an introduction to installation, and tells you which file to read for more information.