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-rw-r--r--libeufin/nexus-tutorial.rst10
1 files changed, 9 insertions, 1 deletions
diff --git a/libeufin/nexus-tutorial.rst b/libeufin/nexus-tutorial.rst
index 53fae68d..4fcb9e27 100644
--- a/libeufin/nexus-tutorial.rst
+++ b/libeufin/nexus-tutorial.rst
@@ -135,7 +135,15 @@ core banking system with EBICS access to bank accounts.
The sandbox relies on a database, which you must specify using a JDBC
connection URI with the ``LIBEUFIN_SANDBOX_DB_CONNECTION`` environment
variable, before invoking any commands.
-(If this variable is not set, ``libeufin-sandbox`` complains and exits.)
+If this variable is not set, ``libeufin-sandbox`` complains and exits:
+
+.. code-block:: console
+
+ $ libeufin-sandbox serve
+ DB connection string not found/valid in the env variable LIBEUFIN_SANDBOX_DB_CONNECTION.
+ The following two examples are valid connection strings:
+ jdbc:sqlite:/tmp/libeufindb.sqlite3
+ jdbc:postgresql://localhost:5432/libeufindb?user=Foo&password=secret
Only *SQLite* (e.g. ``jdbc:sqlite:/tmp/libeufintestdb``) and *PostgreSQL (via TCP)*
(e.g. ``jdbc:postgresql://localhost:$port/libeufintestdb?user=$username&password=$password``)