diff --git a/docs/books/learning_rsync/02_rsync_demo01.md b/docs/books/learning_rsync/02_rsync_demo01.md
index 8e8f397c73..137ca7d2e5 100644
--- a/docs/books/learning_rsync/02_rsync_demo01.md
+++ b/docs/books/learning_rsync/02_rsync_demo01.md
@@ -112,7 +112,7 @@ rsync error: some files/attrs were not transferred (see previous errors) (code 2
 
 **Prompt permission denied, how to deal with it?**
 
-First check the permissions of the /rsync/ directory. Obviously, there is no permission. We can use `setfacl` to give permission:
+First check the permissions of the /rsync/ directory. Obviously, there is no "w" permission. We can use `setfacl` to give permission:
 
 ```bash
 [root@Rocky ~ ] # ls -ld /rsync/