Add List All Key Bindings as a tmux til.

README.md

@@ -86,6 +86,7 @@ smart people at [Hashrocket](http://hashrocket.com/).
 
 ### tmux
 
+- [List All Key Bindings](tmux/list-all-key-bindings.md)
 - [Organizing Windows](tmux/organizing-windows.md)
 - [Reclaiming The Entire Window](tmux/reclaiming-the-entire-window.md)
 - [tmux in your tmux](tmux/tmux-in-your-tmux.md)

tmux/list-all-key-bindings.md

@@ -0,0 +1,24 @@
+# List All Key Bindings
+
+There are a couple ways to list all the tmux key bindings. If you are not
+currently in a tmux sessions, you can enter this from the terminal:
+
+```bash
+$ tmux list-keys
+```
+
+If you are currently in a tmux session, then you can take advantage of the
+tmux environment by either using:
+
+```
+<prefix>:list-keys
+```
+
+or
+
+```
+<prefix>?
+```
+
+Any of these will bring up a list of all key bindings available to you
+within a tmux session on your machine.