Each user can customize their environment using the module command. This command lets you select software and will source the appropriate paths and libraries. All the requested user applications are located under the /opt/apps directory.

To list what applications are available, use the spider sub command:

$ module spider

----------------------------------------------------------------------------
The following is a list of the modules currently available:
----------------------------------------------------------------------------
  GCC: GCC/4.8.3
    The GNU Compiler Collection includes front ends for C, C++,
    Objective-C, Fortran, Java, and Ada, as well as libraries for these
    languages (libstdc++, libgcj,...). - Homepage: http://gcc.gnu.org/ 

  OpenMPI: OpenMPI/1.8.4
    The Open MPI Project is an open source MPI-2 implementation. -
    Homepage: http://www.open-mpi.org/ 

  icc: icc/2015.2.164
    C and C++ compiler from Intel - Homepage:
    http://software.intel.com/en-us/intel-compilers/ 

  iccifort: iccifort/2015.2.164
    Intel C, C++ and Fortran compilers - Homepage:
    http://software.intel.com/en-us/intel-cluster-toolkit-compiler/ 

  ifort: ifort/2015.2.164
    Fortran compiler from Intel - Homepage:
    http://software.intel.com/en-us/intel-compilers/ 

  impi: impi/5.0.3.048
    The Intel(R) MPI Library for Linux* OS is a multi-fabric message
    passing library based on ANL MPICH2 and OSU MVAPICH2. The Intel MPI
    Library for Linux OS implements the Message Passing Interface, version
    2 (MPI-2) specification. - Homepage:
    http://software.intel.com/en-us/intel-mpi-library/ 

----------------------------------------------------------------------------
To learn more about a package enter:

   $ module spider Foo

where "Foo" is the name of a module

To find detailed information about a particular package you
must enter the version if there is more than one version:
   $ module spider Foo/11.1
----------------------------------------------------------------------------

To see a description of a specific package, use the spider sub command again:

$ module spider OpenMPI/1.8.4

----------------------------------------------------------------------------
  OpenMPI: OpenMPI/1.8.4
----------------------------------------------------------------------------
    Description:
      The Open MPI Project is an open source MPI-2 implementation. -
      Homepage: http://www.open-mpi.org/ 

    This module can only be loaded through the following modules:

      GCC/4.8.3
      icc/2015.2.164
      ifort/2015.2.164

To load the module for OpenMPI built with the GCC compilers, for example, use the load sub command:

$ module load GCC OpenMPI

To see a list of modules that you have loaded, use this command:

$ module list

To change to the Intel compiler build of OpenMPI use the swap sub command:

$ module swap GCC icc

Due to MODULEPATH changes the following have been reloaded:
  1) OpenMPI/1.8.4

To unload all of your modules, use this command:

$ module purge

To make sure a set of modules are loaded automatically at login, use the module save sub command:

$ module load GCC OpenMPI
$ module save

Sometimes a module will not load without explicit dependencies. The following outlines this "error" and what to do.

$ module load Boost
 
Lmod has detected the following error:  These module(s) exist but cannot be loaded as requested: "Boost"

   Try: "module spider Boost" to see how to load the module(s).
 
$ module spider Boost
 
----------------------------------------------------------------------------------------------------------------
  Boost:
----------------------------------------------------------------------------------------------------------------
    Description:
      Boost provides free peer-reviewed portable C++ source libraries. - Homepage: http://www.boost.org/

     Versions:
        Boost/1.54.0
        Boost/1.58.0

----------------------------------------------------------------------------------------------------------------
  To find detailed information about Boost please enter the full name.
  For example:

     $ module spider Boost/1.58.0
-------------------------------------------------------------------------------------------------------------
 
$ module load Boost/1.58.0
 
Lmod has detected the following error:  These module(s) exist but cannot be loaded as requested:
"Boost/1.58.0"

   Try: "module spider Boost/1.58.0" to see how to load the module(s).

 
$ module spider Boost/1.58.0
 
----------------------------------------------------------------------------------------------------------------
  Boost: Boost/1.58.0
----------------------------------------------------------------------------------------------------------------
    Description:
      Boost provides free peer-reviewed portable C++ source libraries. - Homepage: http://www.boost.org/

    This module can only be loaded through the following modules:

      GCC/4.4.7  CUDA/7.0.28  OpenMPI/1.8.6
      GCC/4.4.7  OpenMPI/1.8.6
      icc/2015.2.164  OpenMPI/1.8.6
      ifort/2015.2.164  OpenMPI/1.8.6
 
    Help:
      Boost provides free peer-reviewed portable C++ source libraries. - Homepage: http://www.boost.org/
 
$ module load GCC/4.4.7  OpenMPI/1.8.6 Boost/1.58.0
$ module list
 
Currently Loaded Modules:
  1) StdEnv   2) GCC/4.4.7   3) OpenMPI/1.8.6   4) imkl/11.2.2.164   5) Boost/1.58.0