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Eon is divided up into two separate programs: a server and a client. The client does most of the computation (e.g. saddle searches, minimizations, and molecular dynamics) while the server creates the input for the client and processes its results.
We recommend installing Eon to your $HOME folder. To download the latest developer version to your home folder:
$ cd $HOME
$ svn co http://theory.cm.utexas.edu/svn/eon
The directory $HOME/eon needs to be added to your $PYTHONPATH environment variable. It is also recommended to add $HOME/eon/bin to your $PATH. This can be done permanetly by appending the following to your ~/.profile file:
export PYTHONPATH=$HOME/eon:$PYTHONPATH
export PATH=$HOME/eon/bin:$PATH
If you have root permissions, you can install Eon system-wide:
$ cd eon
$ sudo python setup.py install
This will install the eon python module to Python’s site-package directory as well as adding the eon program to your $PATH.
The client source code is located in a folder named client under the main eon directory. For most situations you will only need to run the make command and a binary named client will be built in this directory:
$ cd client
$ make
If you wish to use the potentials that depend on fortran you will need a fortran compiler. However, this is optional and you can compile the client without fortran support by running the command make NO_FORTRAN=1. If you are using gfortran the supplied Makefile should work out of the box. If you are using the Intel Fortran Compiler (ifort) you will need to edit the Makefile to change FC (fortran compiler), FFLAGS (fortran compiler flags), and FAR (fortran archiver) variables to work for your system.
For most installations, the binary client can be copied to a directory in your $PATH and named eonclient. If you added $HOME/eon/bin to your path during the server installation the following command will install the client:
$ cp client ../bin/eonclient
Otherwise you will need to give the path to the client binary in your config.ini.