User environment - The usage of module

We use the module environment, which has a lot of advantages, is very flexible (and user-friendly), and even allows one to use different versions of the same software concurrently on the same system. You can see a list of all available modules by typing

module avail

To load a given module:

module load <name of the module>

The modules system uses a hierarchical file structure, i.e., sometimes (whenever there are ambiguities) you may have to specify a path, as in:

module load fftw2/gcc/64/double

To revert all changes made by a given module (environment variables, paths, etc.):

module unload <name of the module>

A short overview of the options are given in following table (a full list you can get by module help)

Option	Description
avail [<prefix>]	Shows a list of all available modules. Optionally one can specify a prefix to limit the output, e.g. module avail netcdf will show only available modules of netcdf.
clear	Remove all loaded modules.
help	Returns a short help with all available options of the command module.
list	Print a list with all loaded modules.
load <module_name>	Loads the module module_name. If the name includes not the full module name (separated by /) then the latest version of the software is loaded.
show <module_name>	Shows additional information about a specific module, e.g. pathen and environment variables set by the module.
unload <module_name>	Remove the module module_name.