Before installing tsscds, be aware that the program makes use of the following packages that need to be installed in your linux distribution: parallel, sqlite3, python2 (with numpy and scipy libraries), environment modules, and g09 Once “Environment modules” is installed, you can add to your .bash_profile the following line to use the tsscds module: module use path_to_program/modules Where path_to_program is the path where you intend to install tsscds (like $HOME/tsscds-2018). You will also need g09 to run the high-level calculations and it should be run as: g09output. Then, to install the program, follow these steps: 1) ./configure This will install tsscds in $HOME/tsscds-2018 by default. If you want to install it in a different directory, use : ./configure --prefix=path_to_program 2) make 3) make install ###-run 'autoreconf -i' after svn check out