added info on opening editor from terminal

00 Introduction.md

@@ -105,13 +105,15 @@ Note that you may need to update the configuration database before Visual Studio
 sudo apt-get update && sudo apt-get install libgconf2-4
 ```
 
-### Launching a code editor from the Terminal
+### Launching Visual Studio Code from the Terminal
 
-You will be spending a lot of time in the terminal so here is a useful tip. If you have visual studio code installed you can launch it with the contents of a specified directory. Start by editing your `.bash_profile` file located in your home directory. Since this is hidden by default you can open it in **nano** using `nano ~/.bash_profile`. Now add the following line, save the changes and exit.
-```
-code () { VSCODE_CWD="$PWD" open -n -b "com.microsoft.VSCode" --args $* ;}
-```
-Close the terminal and re-launch. Now you can open any directory.
+You will be spending a lot of time in the terminal so here is a useful tip. If you have visual studio code installed you can launch it with the contents of a specified directory.
 
 - `code ~/Documents/bookshop/` opens Visual Studio Code with the contents of the directory specified.
 - `code .` opens Visual Studio Code with the contents of the _current directory_.
+
+If you are using Ubuntu this works 'out of the box' but if you are using MacOS you will need to edit your `.bash_profile` file located in your home directory. Since this is hidden by default you can open it in **nano** using `nano ~/.bash_profile`. Now add the following line, save the changes and exit.
+```
+code () { VSCODE_CWD="$PWD" open -n -b "com.microsoft.VSCode" --args $* ;}
+```
+Close the terminal and re-launch. Now you can open Visual Studio Code using the same commands as Ubuntu.