Fixes: Use systemctl enable --now shortcut in docs #15249

docs/installation/1-postgresql.md

@@ -31,8 +31,7 @@ This section entails the installation and configuration of a local PostgreSQL da
     Once PostgreSQL has been installed, start the service and enable it to run at boot:
 
     ```no-highlight
-    sudo systemctl start postgresql
-    sudo systemctl enable postgresql
+    sudo systemctl enable --now postgresql
     ```
 
 Before continuing, verify that you have installed PostgreSQL 12 or later:

docs/installation/2-redis.md

@@ -14,8 +14,7 @@
 
     ```no-highlight
     sudo yum install -y redis
-    sudo systemctl start redis
-    sudo systemctl enable redis
+    sudo systemctl enable --now redis
     ```
 
 Before continuing, verify that your installed version of Redis is at least v4.0:

docs/installation/4-gunicorn.md

@@ -27,8 +27,7 @@ sudo systemctl daemon-reload
 Then, start the `netbox` and `netbox-rq` services and enable them to initiate at boot time:
 
 ```no-highlight
-sudo systemctl start netbox netbox-rq
-sudo systemctl enable netbox netbox-rq
+sudo systemctl enable --now netbox netbox-rq
 ```
 
 You can use the command `systemctl status netbox` to verify that the WSGI service is running: