1. As a pre-compiled Debian package via Ubuntus launchpad system, a Ubuntu Personal Package Archive (PPA)
   On your command line, execute the three following commands

   sudo add-apt-repository ppa:bibi-help/bibitools
   sudo apt-get update
   sudo apt-get install pkiss
                   

2. As Bellman's GAP sources.
   • Make sure you have installed a running version of Bellman's GAP compiler.
   • Download the Fold-Grammars repository, a broad collection of RNA folding algorithms, written in Bellman's GAP also containing sources for pKiss.
   • Un-tar the repository, change into the Misc/Applications/pKiss directory and execute the make file via the three following commands:

     tar xzvf fold-grammars.tgz
     cd fold-grammars/Misc/Applications/pKiss
     make all

The BiBiServ team does not provide any support for compiling or using a tool from the download section. Please contact the author directly in case of any problem.