diff --git a/dashboard/dashboard-access.md b/dashboard/dashboard-access.md
index 7bc968f02e23b..0b9061da2f93a 100644
--- a/dashboard/dashboard-access.md
+++ b/dashboard/dashboard-access.md
@@ -28,7 +28,7 @@ You can use TiDB Dashboard in the following common desktop browsers of a relativ
 
 ## Sign in
 
-For the first-time access, TiDB Dashboard displays the user sign in interface, as shown in the image below. You can sign in using the TiDB `root` account.
+For the first-time access, TiDB Dashboard displays the user sign in interface, as shown in the image below. You can sign in using the TiDB `root` account. By default, the `root` password is empty.
 
 ![Login interface](/media/dashboard/dashboard-access-login.png)
 
diff --git a/post-installation-check.md b/post-installation-check.md
index a44ba63000319..b97f3b92fadfa 100644
--- a/post-installation-check.md
+++ b/post-installation-check.md
@@ -53,9 +53,11 @@ Log in to the database by running the following command:
 {{< copyable "shell-regular" >}}
 
 ```shell
-mysql -u root -h 10.0.1.4 -P 4000
+mysql -u root -h ${tidb_server_host_IP_address} -P 4000
 ```
 
+`${tidb_server_host_IP_address}` is one of the IP addresses set for `tidb_servers` when you [initialize the cluster topology file](/production-deployment-using-tiup.md#step-3-initialize-cluster-topology-file), such as `10.0.1.7`.
+
 The following information indicates successful login:
 
 ```sql