A1. Check whether gfortran is installed  with  "which gfortran"
A2. Check whether fftw3 are installed with "ldconfig -p | grep fftw". 
A3. check whether openMPI is installed with "which mpirun"

0. unpack the latest version of the ORAC tarball

1. Change to the src directory

2. Run "./configure -GNU -FFTW -OMP ; make"

3. Run "./configure -GNU -FFTW -OMP -MPI ; make"

4. Change to the etc directory

5. Run "source ORACRC"

The commands orac and orac_mpi should be available

Or, as a sequence of commands to execute:

tar zxvf orac.6_0_1.tar.gz
cd orac.6_0.1
cd src
./configure -GNU -FFTW -OMP ; make
./configure -GNU -FFTW -OMP -MPI ; make
cd ../etc
source ORACRC 


