user_guide_executables.md

+# Executables
+Once the installation of HERMESv3_BU is finished the following executables will be available:
+
+1. ```hermesv3_bu```: Main HERMESv3_BU model.
+2. ```hermesv3_bu_download_benchmark```:  Used to download HERMESv3_BU benchmark test case.
+
+## HERMESv3_BU
+hermesv3_bu is the executable of the HERMESv3_BU model.
+
+In order to execute it, the path to the configuration file needs to be provided as follows:
+
+```bash
+hermesv3_bu --my-config '/home/user/hermesv3_bu/conf/hermes.conf'
+
+# or
+
+hermesv3_bu -c '/home/user/hermesv3_bu/conf/hermes.conf'
+```
+
+In order to execute HERMESv3_BU in parallell, the number of processors should also be defined. In the following example, HERMESv3_BU is executed using 24 cpus:
+
+```bash
+mpirun -np 24 hermesv3_bu --my-config '/home/user/hermesv3_bu/conf/hermes.conf'
+
+# or
+
+mpirun -np 24 hermesv3_bu -c '/home/user/hermesv3_bu/conf/hermes.conf'
+```
+
+Configuration options can be passed to HERMESv3_BU via the configuration file (hermes.conf), arguments or a combination of both.
+The arguments passed by command line take priority from the one that appears in the configuration file. To adquire more information about the arguments you can call the hermes help:
+
+```bash
+hermesv3_bu --help
+
+# or
+
+hermesv3_bu -h
+```
+
+## hermesv3_bu_download_benchmark
+This executable allows the user to download the configuration file and benchmark output comparison data to [test the build of HERMESv3_BU](examples_benchmark).
+This step is not required to run HERMESv3_BU but it is recommended for new users.
+The command to execute the file is as follows:
+```bash
+hermesv3_bu_download_benchmark '<PATH_INSTALLATION>/hermesv3_bu_benchmark/'
+```
+
+[Go to User guide page](user_guide)
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