Move pages back into a "pages" folder

pages/common/passwd.md

@@ -0,0 +1,19 @@
+#passwd
+
+> passwd is a tool used to change a user's password.
+
+* Change the password of the current user
+
+`passwd {{new password}}`
+
+* Change the password of the specified user
+
+`passwd {{username}} {{new password}}`
+
+* Get the current statuts of the user
+
+`passwd -S`
+
+* Make the password of the account blank (it will set the named account passwordless)
+
+`passwd -d`