[taler-docs] branch master updated: mention backup

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The following commit(s) were added to refs/heads/master by this push:
     new df269fb  mention backup
df269fb is described below

commit df269fb7205fe6b1f0ca6864284ef408f4e8b8e1
Author: MS <ms@taler.net>
AuthorDate: Tue Oct 6 14:45:58 2020 +0200

    mention backup
---
 libeufin/nexus-tutorial.rst | 26 ++++++++++++++++++++++++--
 1 file changed, 24 insertions(+), 2 deletions(-)

diff --git a/libeufin/nexus-tutorial.rst b/libeufin/nexus-tutorial.rst
index 452f875..0167998 100644
--- a/libeufin/nexus-tutorial.rst
+++ b/libeufin/nexus-tutorial.rst
@@ -44,6 +44,11 @@ Use the following command to *(1) run the nexus service*:
 
   $ libeufin-nexus
 
+After the startup, Nexus should have created a ``.sqlite3`` file in
+its current working directory.  Feel free to use the ``--with-db`` option
+to change the database name and path.  In future releases, the support
+for Postgresql will be provided.
+
 At this point a *(2) superuser account needs to be activated
 into the system*:
 
@@ -73,8 +78,25 @@ creating a EBICS connection*.
         --nexus-password $NEXUS_PASSWORD \
         $NEXUS_URL
 
-If the previous command succeeded, Nexus must communicate all the details
-to the bank.  Therefore, it will *(4) synchronize the connection*.
+If the step above executed correctly, Nexus created all the cryptographic
+material that is needed on the client side; in this EBICS example, it created
+the signature and identification keys.  It is therefore advisable to *(4) make
+a backup copy* of such keys.
+
+.. code-block:: shell
+
+  libeufin-cli \
+    connections \
+      --connection-name $NEXUS_BANK_CONNECTION_NAME \
+      --nexus-user-id $NEXUS_USER \
+      --nexus-password $NEXUS_PASSWORD \
+      --passphrase $SECRET \
+      --outputfile $BACKUP_FILE \
+      $NEXUS_URL
+
+At this point, Nexus must communicate all the details to the bank.  Therefore,
+it will *(4) synchronize the connection*.  In this EBICS example, Nexus will 
send
+the *INI* and *HIA* messages to the bank.
 
 .. code-block:: shell
 

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