CDO is a collection of command line operators to manipulate and analyse Climate and NWP model Data. It has been installed in the directory /apps/chpc/earth/CDO-1.7.1-gcc. Please refer to the CDO home page for more information. A suitable environment should be set up by sourcing a small script: . /apps/chpc/earth/CDO-1.7.1-gcc/setCDO Alternatively, there is also a module: module load chpc/earth/CDO/1.7.1