diff --git a/common/passwd.md b/common/passwd.md
index 8549cf01bf..e1cdf0d6fe 100644
--- a/common/passwd.md
+++ b/common/passwd.md
@@ -2,14 +2,19 @@
 
 > passwd is a tool on most Unix and Unix-like operating systems used to change a user's password.
 
-* Change your password. ( You may need to use **sudo** )
+* Change your password. ( You may need to use **sudo** ). The {{options}} flag can use -a, -d, -e, -h, -S, -i, -k, -l, -m , -q, -r, -u, -v, -x  as arguments.
 
 `passwd {{options}} {{new password}}`
 
-* Change the password of the specified user.
 
-`passwd {{username}} {{new password}}`
+* Gives the current statuts of the user. The status information consists of 7 fields, sutch as the password status, the username, the date, the age etc...   
+
+`passwd -S`
 
 * Make the password of the account blank ( It will set the named account passwordless. )
 
 `passwd -d`
+
+* Change the password of the specified user.
+
+`passwd {{username}} {{new password}}`