Add EasyBuild configuration chapter

docs.it4i/software/tools/easybuild.md

@@ -436,6 +436,49 @@ Job ID                         Username        Queue           Jobname         S
 1319314.isrv5                    username        qprod           git-2.11.0-GNU-    85605    1    16    --  24:00 R 00:00:17
 ```
 
+## Advanced EasyBuild Configuration
+
+By creating the `~/.config/easybuild/config.cfg` file, you can easily specify the desired location of your software, CUDA compute capabilities, and other options that you would usually have to specify within your easyconfig or from the command line. To get an overview of all available options, use `eb --confighelp` command.
+
+You can use our template to set all of the usual EasyBuild variables:
+
+```console
+[MAIN]
+
+[basic]
+locks-dir=EASYBUILD_ROOT/.locks/
+robot=/apps/easybuild/easyconfigs-it4i:/apps/easybuild/easyconfigs-master/easybuild/easyconfigs:/apps/easybuild/easyconfigs-develop/easybuild/easyconfigs
+robot-paths=/apps/easybuild/easyconfigs-it4i:/apps/easybuild/easyconfigs-master/easybuild/easyconfigs:/apps/easybuild/easyconfigs-develop/easybuild/easyconfigs
+
+[config]
+buildpath=/dev/shm/USER/build
+installpath=EASYBUILD_ROOT
+installpath-modules=EASYBUILD_ROOT/modules
+installpath-software=EASYBUILD_ROOT/all
+moduleclasses=python
+repository=FileRepository
+repositorypath=EASYBUILD_ROOT/file-repository
+sourcepath=EASYBUILD_ROOT/sources
+
+[easyconfig]
+local-var-naming-check=error
+
+[override]
+# 8.0 for Karolina, 7.0 for Barbora
+cuda-compute-capabilities=CUDA_CC
+detect-loaded-modules=purge
+enforce-checksums=True
+silence-deprecation-warnings=True
+trace=True
+```
+
+!!! note
+    Do not forget to add the path to your modules to MODULEPATH using the `module use` command in your `~/.bashrc` to be able to lookup and use your installed modules.
+
+Template requires you to fill in the `EASYBUILD_ROOT`, `CUDA_CC`, and `USER` variables. `EASYBUILD_ROOT` is the top level directory which will hold all of your EasyBuild related data. `CUDA_CC` defines the CUDA compute capabilities of graphics cards, and `USER` should preferably be set to your username.
+
+If you plan on writing more than one or two of your own easyconfigs, it might be useful to setup a custom easyconfig repository. Simply prepend it's path to the `robot` and `robot-paths` variables.
+
 [a]: https://code.it4i.cz/sccs/easyconfigs-it4i
 [b]: http://easybuild.readthedocs.io
 [c]: https://github.com/hpcugent/easybuild/wiki/Compiler-toolchains