Update README.md

Author: dlucanu

README.md

@@ -41,7 +41,12 @@
     14
     ```
 It is strongly recommended to include the folder `Linux_Mac` or `Windows` in the PATH environment variable. This allow to call the the interpreter without mentioning the path to its location.
-    
+
+Optionally (and remmended) is to create a symbolic link named `alki`:
+* Linux/Mac OS:
+    ```
+    ln -s ../../bin/alki.sh ../../bin/alki
+    ```
 Read the [reference manual](../../wiki/Reference-Manual) to review the Alk syntax.
 Also consider the [Alk-by example](../../wiki/Alk-by-examples) wiki to understand how Alk behaves in real-scenarios.