In order to install Semigroupe on a UNIX machine, you should (1) Download the file semigroupe.tar.gz (2) Type the following command tar -zxvf semigroupe.tar.gz (3) Goto SemigroupeFolder by typing cd SemigroupeFolder (4) Type the command (you will need the root password) sudo ./install_semigroupe.sh By default, semigroupe is installed in /usr/local/bin and the directory BABEL will be created in /usr/local/etc If you want to install semigroupe elsewhere, the syntax is sudo ./install_semigroupe.sh "dir1" "dir2" where dir1 is the absolute path of the directory of semigroupe and dir2 is the absolute path of the directory of BABEL. Be sure you are using absolute paths ! For instance, if you wish to install semigroupe in /usr/bin, and BABEL in /BABELpath/BABELfolder, type sudo ./install_semigroupe.sh "/usr/bin" "/BABELpath/BABELfolder" (5) Once the programme is installed, just type semigroupe The first time the programme is used, it will create a file .SemigroupePrefs in your home directory. You will be asked to give the path for the example folder ($HOME/Examples is suggested, but you can choose any directory). Don't forget to create the corresponding directory if it does not exist !