Hey girls, the following steps will show you how to use the black window. This window is also called the "command line", "cmd", "prompt" and "terminal".

Each operating system has a set of commands for the command line.

Here is a summary of some useful commands:

| Command (Windows) | Command (Mac OS / Linux) | Description | Example|

| ------------- |-----------|-------------| -----|

| exit | exit | close the window | **exit** |

| cd | cd | change directory | **cd test** |

| dir | ls |list folders/files | **dir** |

| copy | cp | copy file | **copy c:\test\test.txt c:\windows\test.txt** |

| move | mv | move file | **move c:\test\test.txt c:\windows\test.txt** |

| md | mkdir | create a new folder | **md testfolder** |

|del | rm | delete a folder/file | **del c:\test\test.txt**

For more about the above commands, check out the Further Information section below.

These are just a very few of the possible black window commands.

[ss64.com](http://ss64.com) contains a complete reference of commands for all operating systems.

* Up arrow - rerun previous commands. You can avoid typing the same commands again by using the up arrow key to rerun recently used commands.

* Tab key - the tab key will autocomplete folder and file names. For example, typing **dir t ** + Tab will autocomplete to all directories starting with t in the current directory (such as task, test, tutorial).

* The **exit** commmand - this will cause the window to close; it makes sense, right? No need to explain too much ...

* The **cd** command - this command allows you to change your current directory. To use the cd command you type cd directoryname and press enter.

For example if you are in a directory called c:\test, and there were three directories in that the test directory called A, B, and C, you could just type **cd A** and press enter. You would then be in the c:\test\A.

* The **cd ..** command - this will take you to the next folder up.

* The **dir** (Windows) and **ls** (others) command - this will list the files and directories contained in your current directory. If I typed **dir \test** or **ls test** I would see the contents of the c:\test directory.

Also note for many commands you can use the \* symbol which stands for wildcard. With this in mind, typing **dir *.txt** on WIN or **ls *.txt** on other OS will only list those files that end with .txt.

* The **copy** (Windows) or **cp** (others) command - this allows you to copy files from one location to another. To use this command you would type **copy *sourcefile targetfile***. For example if you have the file c:\test\test.txt and would like to copy it to c:\windows\test.txt you would type

**copy c:\test\test.txt c:\windows\test.txt** and press enter.

* The **move** (Windows) or **mv** (others) command - this allows you to move files from one location to another. The syntax you use is the same as for the **copy** command.

* The **md** (Windows) or **mkdir** (others) command - this allows you to create a new directory. For example **md temp** creates a new folder called temp in the current directory.

* The **del** (Windows) or **rm** command (others) - this allows you to delete the specified file. For example, **del test.txt** deletes the test.txt file from the current directory.

Huh, it's exciting, right?! You'll write your first line of code in just a few minutes!

But first, let us tell you what Python is. Python is a very popular programming language that can be used for creating websites, games, scientific software, graphics and much, much more.

Python originated in the late 1980s and its main goal is to be readable by human beings (not only machines!), which is why it looks much simpler than other programming languages. This makes it easy to learn, but don't worry, Python is also really powerful!

Django is written in Python. We need Python to do anything in Django. Let's start with installing it! We want you to install Python 3.4, so if you have any earlier version, you will need to upgrade it.

It is very likely that you already have Python installed out of the box. To check if you have it installed (and which version it is), open a console and type the following command:

If you don't have Python installed or if you want a different version, you can install it as follows:

Type this command into your console:

Use this command in your console:

You need to go to the website https://www.python.org/downloads/release/python-341/ and download the Python installer:

* Download the *Mac OS X 64-bit/32-bit installer* *DMG* file,

* double click to open it,

* double click *Python.mpkg* to run the installer.

Verify the installation was successful by opening the *Terminal* application and running the `python3` command:

If you have any doubts or if something went wrong and you have no idea what to do next - please ask your coach! Sometimes things are not going smoothly and it's better to ask for help from someone with more experience.