merge and move support pages

this are now under the /support path, meaning that this is unified for
all clusters.

docs/support/troubleshooting.md

@@ -0,0 +1,42 @@
+# Troubleshooting
+
+For troubleshooting, please contact us through the official channels. See
+[here](index.md) for more information.
+
+## Known Problems
+
+Before contacting us for support, please check the [Known
+Problems](known-problems.md) page to see if there is an existing workaround for
+your specific problem.
+
+## Troubleshooting Slurm Jobs
+
+If you want to report a problem or request for help when running jobs, please
+**always provide** the following information:
+
+1. Provide your batch script or, alternatively, the path to your batch script.
+2. Add **always** the following commands to your batch script
+
+    ```bash
+    echo "User information:"; who am i
+    echo "Running hostname:"; hostname
+    echo "Current location:"; pwd
+    echo "User environment:"; env
+    echo "List of PModules:"; module list
+    ```
+
+3. Whenever possible, provide the Slurm JobID.
+
+Providing this information is **extremely important** in order to ease
+debugging, otherwise only with the description of the issue or just the error
+message is completely insufficient in most cases.
+
+## Troubleshooting SSH
+
+Use the ssh command with the "-vvv" option and copy and paste the text
+(**please don't send us screenshots**) the output to your request in
+Service-Now. Example:
+
+```bash
+ssh -Y -vvv $username@<hostname>
+```