diff --git a/docs/addendum-10-crazy-command-list/README.md b/docs/addendum-10-crazy-command-list/README.md
index 03952cc..cbeedf1 100644
--- a/docs/addendum-10-crazy-command-list/README.md
+++ b/docs/addendum-10-crazy-command-list/README.md
@@ -37,7 +37,7 @@ title: X - Crazy Command List
 | `whereis` | Find binary |
 | `which` | Locate command |
 | `file` | Details of file type |
-
+| `sha256sum` | returns a hash of the file|
 ## More Detailed Overview
 
 | Command | Description |