docs: add some documentation about the tooling box ./utils/*

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

docs/utils/index.rst

@@ -1,9 +1,10 @@
 
 .. _searx_utils:
+.. _toolboxing:
 
-======================
-Tooling box ``utils/``
-======================
+=======================
+Tooling box ``utils/*``
+=======================
 
 In the folder :origin:`utils/` we maintain some tools useful for admins and
 developers.
@@ -15,9 +16,37 @@ developers.
    filtron.sh
    morty.sh
 
-.. hint::
+.. admonition:: Work needed!
 
-   ATM :ref:`filtron.sh` and :ref:`searx.sh` do supports only systemd init
-   process used by debian, ubuntu and many other dists.  If you have working
-   init.d files to start/stop services, please contribute / thanks!
+   Our scripts to maintain services do most support only systemd init process
+   used by debian, ubuntu and many other dists.  In general our scripts are only
+   partially usable on debian systems.  We are working on this limitation, if
+   you have any contribution, please send us your :pull:`PR <../pulls>`, see
+   :ref:`how to contribute`.
 
+.. _toolboxing common:
+
+Common commands
+===============
+
+Scripts to maintain services often dispose of common commands and environments.
+
+``shell``:
+  Opens a shell from the service user ``${SERVICE_USSR}``, very helpful for
+  troubleshooting.
+
+``inspect service``:
+  Shows status and log of the service, most often you have a option to enable
+  more verbose debug logs.  Very helpful for debugging, but be careful not to
+  enable debugging in a production environment!
+
+.. _toolboxing setup:
+
+Tooling box setup
+=================
+
+The main setup is done in the :origin:`.config.sh` (read also :ref:`makefile
+setup`).
+
+.. literalinclude:: ../../.config.sh
+   :language: bash