Untar the install package
Untar the installation package using
tar xvzf simMachines-wb-1.7. n-install.tar.gz

This will create a folder named workBenchInstall from where you will run the installation script.
Untar the installation package using
tar xvzf simMachines-wb-1.7. n-install.tar.gz

This will create a folder named workBenchInstall from where you will run the installation script.