diff --git a/doc/README.md b/doc/README.md
index 32a57541..2312c56e 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -5,3 +5,25 @@
   [colon commands](_info_/ddt.:cmnds)
 - MIDAS: [manual](info/midas.25)
 - DUMP: [manual](_info_/dump.info), [format](sysdoc/dump.format)
+
+### DDT cheat sheet for Unix users
+
+The `$` character represents typing ESC.
+
+| Unix command  | DDT command          | Colon command            |
+| ------------- | -------------------- | ------------------------ |
+| login user   	| user$u               | :login user              |
+| logout       	| $$u                  | :logout                  |
+| ls           	| ^F                   | :listf                   |
+| ls dir       	| dir^F                | :listf dir               |
+| ls /         	| ^R m.f.d. (file)     | :print m.f.d. (file)     |
+| more file    	| ^R file              | :print file              |
+| mkdir dir    	| ^R dir;..new. (udir) | :print dir;..new. (udir) |
+| cd dir       	| dir$$s               | :cwd dir                 |
+| cp f1 f2     	| $^R f1,f2            | :copy f1,f2              |
+| rm file      	| ^O file              | :delete file             |
+| ln f1 f2     	| $^O f1,f2            | :link f1,f2              |
+| mv f1 f2     	| $$^O f1,f2           | :rename f1,f2            |
+| mv file dir  	|                      | :move file,dir           |
+| ps           	| $$v                  | :listj                   |
+| killall -9 id	| id$j  $^X            | :job id  :kill           |