Add how to start roscore in docker (ros1) (StoglRobotics#105)

Add roscore how to start roscore in docker
Robotgir · Feb 23, 2023 · a0e899c · a0e899c
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diff --git a/docs/faq/index.rst b/docs/faq/index.rst
@@ -19,3 +19,7 @@ We explain :ref:`here <docker-nvidia-support-how-to>` how to expose your nvidia
 sudo: unable to resolve host <hostname>: Name or service not known
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 Problem using sudo: If you encounter following message trying to use sudo: ``sudo: unable to resolve host <hostname>: Name or service not known``. You have to add ``127.0.0.1 <hostname>`` to the ``/etc/hosts`` file inside the container. However, using sudo should work fine without adding it.
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+Docker and ROS1: Can not start my roscore.
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+If you try to start your roscore inside the docker container with ``roscore``-command and get the following error message: ``RLException: Unable to contact my own server at [http://<hostname>:<port>]``. You have to add ``127.0.0.1 <hostname>`` to the ``/etc/hosts`` file inside the container.