Fix a Tarball installation issue (neo4j#1894)

Author: NataliaIvakina

modules/ROOT/pages/installation/linux/tarball.adoc

@@ -97,7 +97,14 @@ TimeoutSec=120
 WantedBy=multi-user.target
 ----
 
-. Reload systemctl to pick up the new service file and configure Neo4j to start at boot time:
+. Reload systemctl to pick up the new service file:
++
+[source, shell]
+----
+systemctl daemon-reload
+----
+
+. Configure Neo4j to start at boot time:
 +
 [source, shell]
 ----