added ; && and ||

bash.txt

@@ -314,6 +314,17 @@ other things we've seen:
 Control Flow
 ------------
 
+The simplest form of control flow uses boolean operators to combine
+commands
+
+| *Combination* | *Execution*                                      |
+| ------------- | -----------                                      |
+| `foo ; bar`   | Execute `foo`, then execute `bar`                |
+| `foo && bar`  | Execute `foo`; if successful execute `bar`       |
+| `foo || bar`  | Execute `foo`; if *not* successful execute `bar` |
+
+The return status is always the status of the last command executed.
+
 Bash has an if/then/elif/else/fi construction. The minimal version is
 if/then/fi, as in: