op-guide, tikv: update ansible useradd command (#564)

lilin90 · CaitinChen · commit 73a875dc8aae · 2018-08-08T19:32:06.000+08:00
Via: pingcap/docs-cn#834
diff --git a/op-guide/ansible-deployment.md b/op-guide/ansible-deployment.md
@@ -72,7 +72,7 @@ Make sure you have logged in to the Control Machine using the `root` user accoun
 1. Create the `tidb` user.
 
     ```
-    # useradd tidb
+    # useradd -m -d /home/tidb tidb
     ```
 
 2. Set a password for the `tidb` user account.
diff --git a/tikv/deploy-tikv-using-ansible.md b/tikv/deploy-tikv-using-ansible.md
@@ -59,7 +59,7 @@ Make sure you have logged in to the Control Machine using the `root` user accoun
 1. Create the `tidb` user.
 
     ```
-    # useradd tidb
+    # useradd -m -d /home/tidb tidb
     ```
 
 2. Set a password for the `tidb` user account.
