diff --git a/INSTALL.md b/INSTALL.md
new file mode 100644
index 0000000..133f144
--- /dev/null
+++ b/INSTALL.md
@@ -0,0 +1,474 @@
+# Installation Tutorial
+
+To follow this course, an installation of **PostgreSQL 13** or higher is expected.
+
+The following is a detailed tutorial as to
+ how to install and set up a Postgres server
+ on an [Ubuntu Linux](https://ubuntu.com) machine
+ that is run **[virtually 
](https://en.wikipedia.org/wiki/Virtual_machine)**
+ on the student's own laptop or workstation by [VirtualBox](https://www.virtualbox.org/).
+VirtualBox is freely available for all major operating systems
+ (i.e., MacOS, Linux, and Windows).
+It is used in this course as then each student should be able
+ to follow the further installation instructions below easily
+ and end up having a development environment similar to the instructor's one.
+Of course, students may also use any other way of setting up a PostgreSQL server;
+ most notably, they may install it on their machine *without* a virtualization.
+
+
+## Install VirtualBox
+
+Go to [virtualbox.org](https://www.virtualbox.org/),
+ download the latest version of VirtualBox for your operating system,
+ and install it according to the instructions given there.
+
+
+## Create a new Virtual Machine
+
+First, go to [ubuntu.com](https://ubuntu.com/download/desktop),
+ download the latest version (i.e., 21.04 at the time of this writing)
+ of **Ubuntu Desktop** (i.e., *not* server),
+ and proceed with the following steps.
+Ubuntu is available for free;
+ the name of the downloaded file should be something like "*ubuntu-21.04-desktop-amd64.iso*"
+ (i.e., one big ISO file).
+This file represents the contents of an "Ubuntu Installation DVD".
+
+
+
+Next, create a new virtual machine in VirtualBox
+ by clicking on the blue "New" button in the toolbar on the top.
+Note that the screenshots of VirtualBox's overview window below
+ already show an older virtual machine running Windows 10.
+
+
+
+A helper widget opens.
+Specify the following settings:
+1. Name the virtual machine (e.g. "*Ubuntu_21.04*")
+ and choose a folder on your personal computer
+ where the virtual machine's data are stored
+ (e.g. "*/home/webartifex/vboxes*").
+ The type and version should already be set automatically.
+2. Choose the amount of memory (i.e., RAM)
+ that the virtual machine is allowed to use:
+ This should be around 33% to 66% of your personal computer's capacity
+ (if unsure, take the recommended default).
+3. Create a *new* virtual hard disk,
+4. keep the hard disk file type as "*VDI*",
+5. have the storage on the physical hard disk allocated *dynamically*, and
+6. choose a big enough maximum size for the file holding the virtual hard disk
+ (10-25 GB is sufficient to follow this course).
+ Dynamic disk space allocation means that
+ not all of this space is used right away on your personal computer.
+
+
+
+
+
+
+
+
+
+
+
+
+
+After this, the new virtual machine should show up in the overview.
+
+
+
+To start the new virtual machine,
+ click on the green "Start" arrow in the toolbar
+ while the machine is selected on the left.
+A second VirtualBox window opens showing the virtual machine's screen.
+On the first start-up, a widget should come up automatically
+ (see next paragraph if the widget does not appear)
+ asking to select a start-up disk (i.e., a CD or DVD)
+ from which the empty virtual machine should boot up.
+Choose the downloaded ISO file from above
+ (if it is not already found automatically)
+ and proceed by clicking on "Start".
+Continue with the "[Install Ubuntu](#install-ubuntu)" step below.
+
+
+
+
+### Inserting CDs/DVDs
+
+If the "Select start-up disk" widget does *not* show up automatically,
+ the virtual machine will *not* boot at all.
+After all, its hard drive is empty and no DVD/ISO is "laid in".
+So, its screen remains black.
+In that case, close the window with the running virtual machine:
+ In the prompt, choose the "Power off the machine" option.
+Then, in the overview,
+ click on the orange "Settings" button in the toolbar
+ while the machine is selected on the left.
+A "Settings" widget opens: Choose the "Storage" tab on the left.
+There, click on the round disk symbol to the right of "Controller: IDE",
+ which opens another "Optical Disk Selector" widget.
+In that, click on the "Add" button,
+ choose the downloaded ISO file from above, and
+ click on "Choose" to confirm the selection.
+Now, you should see the ISO file's name
+ below the "Controller: IDE" option in the middle.
+Finally, close the "Settings" menu by clicking "Ok"
+ and start the virtual machine again.
+
+
+
+
+
+
+
+
+
+
+## Install Ubuntu
+
+With the Ubuntu Installation DVD/ISO "laid in",
+ the virtual machine should now boot up properly
+ and stop at a "Welcome" screen.
+There, click on the "Install Ubuntu" button.
+You may want to choose a language other than "English".
+
+**Note**: Once you click somewhere with your mouse inside a virtual machine,
+ the mouse pointer is said to be "captured" by that machine and
+ you can *not* leave the virtual machine any more with your mouse.
+Then, you must press the so-called **host key** first.
+By default, this is the right "*Ctrl*" key on your keyboard.
+
+
+
+Sometimes, the boot process "hangs" at a black "boot loader" screen.
+If so, simply choose the "Ubuntu" option
+ with your keyboard's arrow and "Enter" keys.
+That should take you to the above "Welcome" screen.
+
+
+
+From the "Welcome" screen, follow the installation guide:
+1. Choose a keyboard layout corresponding to your *physical* computer,
+2. select "Minimal Installation" including the "other options",
+3. erase the virtual hard disk,
+4. specify where you are located,
+5. create a user account to sign on,
+6. wait for the installation to finish, and
+7. remove the Installation DVD/ISO
+ (by right-clicking on the gray disk symbol below the screen
+ and choosing "Remove ...";
+ it may be that this happens automatically).
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+### Configure Ubuntu
+
+After installation, the virtual machine may reboot automatically.
+If not, simple start it again.
+This takes you to the login screen.
+Sign on with the credentials you specified during installation.
+
+
+
+If an "Update" widget appears in the next moments,
+ simply ignore it by clicking "Remind me later".
+You will learn how to update an Ubuntu system from the command line further below.
+
+
+
+After the first sign-on, a "First Steps" wizard pops up.
+As Ubuntu is only installed on a virtual machine,
+ do not connect to any online accounts,
+ turn off the background telemetry (e.g., crash reports), and
+ disable the location services.
+
+
+
+
+
+
+
+
+
+Next, open the application launcher
+ by clicking on the dots in the lower left corner,
+ seach for the "Terminal" app,
+ and open it.
+
+
+
+
+
+
+### Update Ubuntu
+
+The first thing you want to always do after a fresh installation
+ is to check for available updates.
+The command to enter in the terminal is `sudo apt update`.
+`sudo` is simply the Linux way of saying
+ "the following command needs administrator privileges".
+`apt` is Ubuntu's default program to manage the installed [software packages ](https://en.wikipedia.org/wiki/Package_manager).
+The sub-command `update` checks if updates are available.
+Using `sudo` implies that you have to enter your user's password in the terminal.
+
+
+
+
+
+As we can tell from the previous screenshot,
+ there are packages that can be upgraded.
+To start the upgrade process, type `sudo apt upgrade`.
+The terminal then asks if it should proceed
+ while listing all the packages to be upgraded.
+Press the "Enter" key to continue.
+
+
+
+
+
+
+
+
+
+Commonly, when individual packages are upgraded,
+ they may not need some other package any more to work.
+In general, we say that if package *A* needs package *B* to function correctly,
+ package *B* is a [dependency ](https://en.wikipedia.org/wiki/Coupling_%28computer_programming%29) of package *A*.
+The command `sudo apt autoremove` removes unneeded packages
+ from the virtual machine, freeing some of its hard drive's storage.
+
+
+
+
+
+
+
+Finally, after the system upgrade, restart the machine.
+You can do that
+ by clicking on the tray icons in the upper right corner
+ and using the provided graphical options.
+
+
+
+Congratulations!
+You now have a virtual machine running the latest Ubuntu Linux.
+
+
+## Install VirtualBox's Guest Additions
+
+In order to make the newly created *virtual* Ubuntu machine,
+ which takes the role of the **guest** system,
+ interact seamlessly with your *physical* computer,
+ which takes the role of the **host** system,
+ you can (and should) install VirtualBox's [Guest Additions](https://www.virtualbox.org/manual/ch04.html).
+One example for a seamless integration is
+ that the guest system's screen resolution auto-adjusts
+ whenever you resize the VirtualBox window in that it is running.
+
+To install the Guest Additions,
+ first start the virtual machine and sign in.
+Then, choose the "Insert Guest Additions CD image ..." in the "Devices" menu
+ in the enclosing VirtualBox window.
+Just to state the maybe obvious:
+ This menu option is *not* available in the Ubuntu system.
+Depending on your host system, the menu may look different.
+If this option does not exist at all,
+ you could also "insert" the Guest Additions CD
+ as described in the "[Inserting CDs/DVDs](#inserting-cdsdvds)" section above.
+You may be prompted to download the Guest Additions ISO file first.
+
+
+
+
+
+
+
+The Ubuntu guest system should automatically detect
+ that the inserted CD has an auto-run option.
+Simply, click "Run" and confirm the action with your user's password.
+
+
+
+A script is run inside a terminal window.
+Wait until this is finished and hit the "Enter" key.
+
+
+
+After the installation of the Guest Additions,
+ do not forget to eject the CD
+ by right-clicking on the disk symbol and selecting "Eject".
+
+
+
+
+### Add a Shared Folder
+
+Another benefit of installing the Guest Additions is
+ that you can set up a shared folder
+ between your physical host system and the virtual Ubuntu guest system.
+You can use that, for example,
+ to back up SQL files created inside the virtual machine
+ in your common file system.
+
+First, power off the machine
+ and open the "Settings" widget with the orange "Settings" button in the toolbar.
+There, go to the "Shared Folders" tab on the left.
+Then, click on the "Add Folder" symbol on the right,
+ and choose a folder on your personal computer's file system
+ (e.g., a good choice could be your "Desktop" folder).
+Also, check the "Auto-mount" option.
+
+
+
+
+
+
+
+After signing in the next time,
+ Ubuntu's file browser should show you the shared folder
+ (i.e., "*sf_shared*" in the screenshot below)
+ as an external drive (i.e., that's why the "Eject" symbol is next to "*sf_shared*").
+
+
+
+
+## Install PostgreSQL Server
+
+With a ready Ubuntu installation it is now time
+ to install and set up a [PostgreSQL](https://www.postgresql.org/) server.
+
+To do so, open a new terminal window in the virtual machine
+ and run the `sudo apt install postgresql postgresql-contrib` command.
+The `install` sub-command of the `apt` program does what we expect it to.
+While the `postgresql` package contains all the basic features,
+ the `postgresql-contrib` package offers some common [additional modules](https://www.postgresql.org/docs/10/contrib.html).
+
+
+
+
+
+
+
+
+
+With the command `sudo service postgresql status` one can check
+ if Postgres is running as a service on the virtual machine.
+To exit the status view, press the "q" key.
+
+
+
+
+## Install Git
+
+To clone the [GitHub repository 
](https://github.com/webartifex/intro-to-sql)
+ with the materials for this course,
+ you must first install the [git](https://git-scm.com/) utility.
+`git` is a so-called **[version control ](https://en.wikipedia.org/wiki/Version_control)** software.
+
+To do so, run the command `sudo apt install git` in a terminal.
+
+
+
+
+
+
+
+To check if `git` works,
+ you could run a command like `git --version`
+ that simply shows the installed version of `git`.
+
+
+
+`git` is a tool worth learning about in detail.
+As a reading recommendation,
+ the best source for an introduction to `git`
+ is probably the official [online book](https://git-scm.com/book/en/v2/).
+
+
+### Configure Git
+
+To get `git` to work in our virtual machine,
+ we must at least go through the [First-time Git Setup](https://git-scm.com/book/en/v2/Getting-Started-First-Time-Git-Setup) chapter
+ in the official book.
+In summary,
+ you simply have to specify your name and email (or anonymous substitutes)
+ in a terminal with the following commands:
+- `git config --global user.name ""` and
+- `git config --global user.email ""`.
+
+To check if the configuration is stored, run `git config --list`.
+
+
+
+
+### Download the Course Materials
+
+To obtain your own copy of the course materials,
+ you must "[clone](https://git-scm.com/book/en/v2/Git-Basics-Getting-a-Git-Repository)"
+ the [GitHub repository ](https://github.com/webartifex/intro-to-sql)
+ with the materials.
+That is done with the command `git clone https://github.com/webartifex/intro-to-sql.git`.
+In the screenshot,
+ you see this done
+ after going into the virtual machine's "Desktop" folder with `cd Desktop/`.
+Alternatively, you could clone the repository into your user's home folder
+ (i.e., what the `~` means).
+
+
+
+
+## Verify Python works
+
+As this course also shows
+ how to embed a database like Postgres
+ in a typical backend application,
+ written, for example, in [Python 
](https://www.python.org/),
+ we need to ensure that we can start a Python process.
+
+By default, recent Ubuntu versions
+ come with [Python 3 ](https://docs.python.org/3/) pre-installed.
+The command `sudo apt install python3` confirms that:
+ The `python3` package is already there.
+
+
+
+
+
+We could just as well start an interactive Python shell
+ with the simple `python3` command.
+
+
+
+Typing `python` for short instead fails.
+This command used to point to the Python 2 installation, which has been discontinued.
+
+
+
+For convenience, install the `python-is-python3` package.
+Then, you may use the `python` and `python3` commands interchangeably.
+
+
+
+
+
+Congratulations!
+You are now all set to follow this course and learn about SQL.
+
diff --git a/README.md b/README.md
index 5e54d28..4f65e84 100644
--- a/README.md
+++ b/README.md
@@ -3,5 +3,19 @@
This project is a *thorough* introductory course
in **[SQL ](https://en.wikipedia.org/wiki/SQL)**
and **[databases ](https://en.wikipedia.org/wiki/Database)**
- based on the free and open-source database [PostgreSQL 
](https://www.postgresql.org/).
+ based on the free and open-source database **[PostgreSQL ](https://www.postgresql.org/)** (or "Postgres" for short).
+
+
+## Installation
+
+To follow this course, an installation of **PostgreSQL 13** or higher is expected.
+If you know how to do this on your own machine,
+ you may do so at your own discretion.
+Yet, to ensure that
+ each student has a development environment
+ similar to the instructor's one,
+ follow this *extensive* **[installation tutorial](INSTALL.md)**
+ and set up a [virtual machine ](https://en.wikipedia.org/wiki/Virtual_machine)
+ with all the required software on it.
+The estimated time for this should be around *one hour*.
diff --git a/static/installation/0_create_vm_0_download_ubuntu.png b/static/installation/0_create_vm_0_download_ubuntu.png
new file mode 100644
index 0000000..c8f9adb
Binary files /dev/null and b/static/installation/0_create_vm_0_download_ubuntu.png differ
diff --git a/static/installation/0_create_vm_1_overview_without_new_machine.png b/static/installation/0_create_vm_1_overview_without_new_machine.png
new file mode 100644
index 0000000..07730c0
Binary files /dev/null and b/static/installation/0_create_vm_1_overview_without_new_machine.png differ
diff --git a/static/installation/0_create_vm_2_name.png b/static/installation/0_create_vm_2_name.png
new file mode 100644
index 0000000..989b626
Binary files /dev/null and b/static/installation/0_create_vm_2_name.png differ
diff --git a/static/installation/0_create_vm_3_memory.png b/static/installation/0_create_vm_3_memory.png
new file mode 100644
index 0000000..35b374d
Binary files /dev/null and b/static/installation/0_create_vm_3_memory.png differ
diff --git a/static/installation/0_create_vm_4_hard_disk.png b/static/installation/0_create_vm_4_hard_disk.png
new file mode 100644
index 0000000..d00918e
Binary files /dev/null and b/static/installation/0_create_vm_4_hard_disk.png differ
diff --git a/static/installation/0_create_vm_5_hard_disk_type.png b/static/installation/0_create_vm_5_hard_disk_type.png
new file mode 100644
index 0000000..5ff679f
Binary files /dev/null and b/static/installation/0_create_vm_5_hard_disk_type.png differ
diff --git a/static/installation/0_create_vm_6_dynamic_allocation.png b/static/installation/0_create_vm_6_dynamic_allocation.png
new file mode 100644
index 0000000..2ce69cf
Binary files /dev/null and b/static/installation/0_create_vm_6_dynamic_allocation.png differ
diff --git a/static/installation/0_create_vm_7_hard_disk_size.png b/static/installation/0_create_vm_7_hard_disk_size.png
new file mode 100644
index 0000000..04ee697
Binary files /dev/null and b/static/installation/0_create_vm_7_hard_disk_size.png differ
diff --git a/static/installation/0_create_vm_8_overview_with_new_machine.png b/static/installation/0_create_vm_8_overview_with_new_machine.png
new file mode 100644
index 0000000..30b4400
Binary files /dev/null and b/static/installation/0_create_vm_8_overview_with_new_machine.png differ
diff --git a/static/installation/10_download_materials.png b/static/installation/10_download_materials.png
new file mode 100644
index 0000000..503dd13
Binary files /dev/null and b/static/installation/10_download_materials.png differ
diff --git a/static/installation/11_install_python_0.png b/static/installation/11_install_python_0.png
new file mode 100644
index 0000000..92cefd5
Binary files /dev/null and b/static/installation/11_install_python_0.png differ
diff --git a/static/installation/11_install_python_1.png b/static/installation/11_install_python_1.png
new file mode 100644
index 0000000..0dc4180
Binary files /dev/null and b/static/installation/11_install_python_1.png differ
diff --git a/static/installation/11_install_python_2.png b/static/installation/11_install_python_2.png
new file mode 100644
index 0000000..c2f3425
Binary files /dev/null and b/static/installation/11_install_python_2.png differ
diff --git a/static/installation/11_install_python_3.png b/static/installation/11_install_python_3.png
new file mode 100644
index 0000000..12034a8
Binary files /dev/null and b/static/installation/11_install_python_3.png differ
diff --git a/static/installation/11_install_python_4.png b/static/installation/11_install_python_4.png
new file mode 100644
index 0000000..44c5cae
Binary files /dev/null and b/static/installation/11_install_python_4.png differ
diff --git a/static/installation/11_install_python_5.png b/static/installation/11_install_python_5.png
new file mode 100644
index 0000000..4a0529b
Binary files /dev/null and b/static/installation/11_install_python_5.png differ
diff --git a/static/installation/1_first_boot_0_select_startup_disk.png b/static/installation/1_first_boot_0_select_startup_disk.png
new file mode 100644
index 0000000..c418f2a
Binary files /dev/null and b/static/installation/1_first_boot_0_select_startup_disk.png differ
diff --git a/static/installation/1_first_boot_1_overview_with_new_machine.png b/static/installation/1_first_boot_1_overview_with_new_machine.png
new file mode 100644
index 0000000..6c26024
Binary files /dev/null and b/static/installation/1_first_boot_1_overview_with_new_machine.png differ
diff --git a/static/installation/1_first_boot_2_settings.png b/static/installation/1_first_boot_2_settings.png
new file mode 100644
index 0000000..77b4268
Binary files /dev/null and b/static/installation/1_first_boot_2_settings.png differ
diff --git a/static/installation/1_first_boot_3_choose_iso.png b/static/installation/1_first_boot_3_choose_iso.png
new file mode 100644
index 0000000..0002d0d
Binary files /dev/null and b/static/installation/1_first_boot_3_choose_iso.png differ
diff --git a/static/installation/1_first_boot_4_confirm.png b/static/installation/1_first_boot_4_confirm.png
new file mode 100644
index 0000000..52fbdd2
Binary files /dev/null and b/static/installation/1_first_boot_4_confirm.png differ
diff --git a/static/installation/2_install_ubuntu_0_welcome.png b/static/installation/2_install_ubuntu_0_welcome.png
new file mode 100644
index 0000000..da879c3
Binary files /dev/null and b/static/installation/2_install_ubuntu_0_welcome.png differ
diff --git a/static/installation/2_install_ubuntu_1_boot_loader.png b/static/installation/2_install_ubuntu_1_boot_loader.png
new file mode 100644
index 0000000..727302f
Binary files /dev/null and b/static/installation/2_install_ubuntu_1_boot_loader.png differ
diff --git a/static/installation/2_install_ubuntu_2_keyboard_layout.png b/static/installation/2_install_ubuntu_2_keyboard_layout.png
new file mode 100644
index 0000000..7b02a97
Binary files /dev/null and b/static/installation/2_install_ubuntu_2_keyboard_layout.png differ
diff --git a/static/installation/2_install_ubuntu_3_packages.png b/static/installation/2_install_ubuntu_3_packages.png
new file mode 100644
index 0000000..fc12f73
Binary files /dev/null and b/static/installation/2_install_ubuntu_3_packages.png differ
diff --git a/static/installation/2_install_ubuntu_4_clean_install_0.png b/static/installation/2_install_ubuntu_4_clean_install_0.png
new file mode 100644
index 0000000..6ac6ff8
Binary files /dev/null and b/static/installation/2_install_ubuntu_4_clean_install_0.png differ
diff --git a/static/installation/2_install_ubuntu_4_clean_install_1.png b/static/installation/2_install_ubuntu_4_clean_install_1.png
new file mode 100644
index 0000000..7ddb699
Binary files /dev/null and b/static/installation/2_install_ubuntu_4_clean_install_1.png differ
diff --git a/static/installation/2_install_ubuntu_5_location.png b/static/installation/2_install_ubuntu_5_location.png
new file mode 100644
index 0000000..53e7101
Binary files /dev/null and b/static/installation/2_install_ubuntu_5_location.png differ
diff --git a/static/installation/2_install_ubuntu_6_user.png b/static/installation/2_install_ubuntu_6_user.png
new file mode 100644
index 0000000..c6dc604
Binary files /dev/null and b/static/installation/2_install_ubuntu_6_user.png differ
diff --git a/static/installation/2_install_ubuntu_7_finish_0.png b/static/installation/2_install_ubuntu_7_finish_0.png
new file mode 100644
index 0000000..53d2167
Binary files /dev/null and b/static/installation/2_install_ubuntu_7_finish_0.png differ
diff --git a/static/installation/2_install_ubuntu_7_finish_1.png b/static/installation/2_install_ubuntu_7_finish_1.png
new file mode 100644
index 0000000..c8c1f46
Binary files /dev/null and b/static/installation/2_install_ubuntu_7_finish_1.png differ
diff --git a/static/installation/2_install_ubuntu_8_restart.png b/static/installation/2_install_ubuntu_8_restart.png
new file mode 100644
index 0000000..e3b06ce
Binary files /dev/null and b/static/installation/2_install_ubuntu_8_restart.png differ
diff --git a/static/installation/3_configure_ubuntu_0_first_startup.png b/static/installation/3_configure_ubuntu_0_first_startup.png
new file mode 100644
index 0000000..23d1bb2
Binary files /dev/null and b/static/installation/3_configure_ubuntu_0_first_startup.png differ
diff --git a/static/installation/3_configure_ubuntu_1_update.png b/static/installation/3_configure_ubuntu_1_update.png
new file mode 100644
index 0000000..9764823
Binary files /dev/null and b/static/installation/3_configure_ubuntu_1_update.png differ
diff --git a/static/installation/3_configure_ubuntu_2_wizard_0_online_accounts.png b/static/installation/3_configure_ubuntu_2_wizard_0_online_accounts.png
new file mode 100644
index 0000000..2583f31
Binary files /dev/null and b/static/installation/3_configure_ubuntu_2_wizard_0_online_accounts.png differ
diff --git a/static/installation/3_configure_ubuntu_2_wizard_1_telemetry.png b/static/installation/3_configure_ubuntu_2_wizard_1_telemetry.png
new file mode 100644
index 0000000..a350113
Binary files /dev/null and b/static/installation/3_configure_ubuntu_2_wizard_1_telemetry.png differ
diff --git a/static/installation/3_configure_ubuntu_2_wizard_2_location_share.png b/static/installation/3_configure_ubuntu_2_wizard_2_location_share.png
new file mode 100644
index 0000000..5a6530c
Binary files /dev/null and b/static/installation/3_configure_ubuntu_2_wizard_2_location_share.png differ
diff --git a/static/installation/3_configure_ubuntu_2_wizard_3_apps.png b/static/installation/3_configure_ubuntu_2_wizard_3_apps.png
new file mode 100644
index 0000000..c029f29
Binary files /dev/null and b/static/installation/3_configure_ubuntu_2_wizard_3_apps.png differ
diff --git a/static/installation/3_configure_ubuntu_3_terminal_0.png b/static/installation/3_configure_ubuntu_3_terminal_0.png
new file mode 100644
index 0000000..e43c359
Binary files /dev/null and b/static/installation/3_configure_ubuntu_3_terminal_0.png differ
diff --git a/static/installation/3_configure_ubuntu_3_terminal_1.png b/static/installation/3_configure_ubuntu_3_terminal_1.png
new file mode 100644
index 0000000..4073d62
Binary files /dev/null and b/static/installation/3_configure_ubuntu_3_terminal_1.png differ
diff --git a/static/installation/4_update_ubuntu_0_apt_update_0.png b/static/installation/4_update_ubuntu_0_apt_update_0.png
new file mode 100644
index 0000000..259a894
Binary files /dev/null and b/static/installation/4_update_ubuntu_0_apt_update_0.png differ
diff --git a/static/installation/4_update_ubuntu_0_apt_update_1.png b/static/installation/4_update_ubuntu_0_apt_update_1.png
new file mode 100644
index 0000000..b72f05c
Binary files /dev/null and b/static/installation/4_update_ubuntu_0_apt_update_1.png differ
diff --git a/static/installation/4_update_ubuntu_1_apt_upgrade_0.png b/static/installation/4_update_ubuntu_1_apt_upgrade_0.png
new file mode 100644
index 0000000..8d9d240
Binary files /dev/null and b/static/installation/4_update_ubuntu_1_apt_upgrade_0.png differ
diff --git a/static/installation/4_update_ubuntu_1_apt_upgrade_1.png b/static/installation/4_update_ubuntu_1_apt_upgrade_1.png
new file mode 100644
index 0000000..9207147
Binary files /dev/null and b/static/installation/4_update_ubuntu_1_apt_upgrade_1.png differ
diff --git a/static/installation/4_update_ubuntu_1_apt_upgrade_2.png b/static/installation/4_update_ubuntu_1_apt_upgrade_2.png
new file mode 100644
index 0000000..2ddaaeb
Binary files /dev/null and b/static/installation/4_update_ubuntu_1_apt_upgrade_2.png differ
diff --git a/static/installation/4_update_ubuntu_1_apt_upgrade_3.png b/static/installation/4_update_ubuntu_1_apt_upgrade_3.png
new file mode 100644
index 0000000..9618fd6
Binary files /dev/null and b/static/installation/4_update_ubuntu_1_apt_upgrade_3.png differ
diff --git a/static/installation/4_update_ubuntu_2_apt_autoremove_0.png b/static/installation/4_update_ubuntu_2_apt_autoremove_0.png
new file mode 100644
index 0000000..0108648
Binary files /dev/null and b/static/installation/4_update_ubuntu_2_apt_autoremove_0.png differ
diff --git a/static/installation/4_update_ubuntu_2_apt_autoremove_1.png b/static/installation/4_update_ubuntu_2_apt_autoremove_1.png
new file mode 100644
index 0000000..813a09c
Binary files /dev/null and b/static/installation/4_update_ubuntu_2_apt_autoremove_1.png differ
diff --git a/static/installation/4_update_ubuntu_2_apt_autoremove_2.png b/static/installation/4_update_ubuntu_2_apt_autoremove_2.png
new file mode 100644
index 0000000..5ccc5d1
Binary files /dev/null and b/static/installation/4_update_ubuntu_2_apt_autoremove_2.png differ
diff --git a/static/installation/4_update_ubuntu_3_restart.png b/static/installation/4_update_ubuntu_3_restart.png
new file mode 100644
index 0000000..45c6850
Binary files /dev/null and b/static/installation/4_update_ubuntu_3_restart.png differ
diff --git a/static/installation/5_guest_additions_0_insert_disk_0.png b/static/installation/5_guest_additions_0_insert_disk_0.png
new file mode 100644
index 0000000..b1638cd
Binary files /dev/null and b/static/installation/5_guest_additions_0_insert_disk_0.png differ
diff --git a/static/installation/5_guest_additions_0_insert_disk_1.png b/static/installation/5_guest_additions_0_insert_disk_1.png
new file mode 100644
index 0000000..fc75281
Binary files /dev/null and b/static/installation/5_guest_additions_0_insert_disk_1.png differ
diff --git a/static/installation/5_guest_additions_0_insert_disk_2.png b/static/installation/5_guest_additions_0_insert_disk_2.png
new file mode 100644
index 0000000..3905a53
Binary files /dev/null and b/static/installation/5_guest_additions_0_insert_disk_2.png differ
diff --git a/static/installation/5_guest_additions_1_autostart.png b/static/installation/5_guest_additions_1_autostart.png
new file mode 100644
index 0000000..64abeae
Binary files /dev/null and b/static/installation/5_guest_additions_1_autostart.png differ
diff --git a/static/installation/5_guest_additions_2_install.png b/static/installation/5_guest_additions_2_install.png
new file mode 100644
index 0000000..000105c
Binary files /dev/null and b/static/installation/5_guest_additions_2_install.png differ
diff --git a/static/installation/5_guest_additions_3_eject.png b/static/installation/5_guest_additions_3_eject.png
new file mode 100644
index 0000000..ea85dbe
Binary files /dev/null and b/static/installation/5_guest_additions_3_eject.png differ
diff --git a/static/installation/6_shared_folder_0.png b/static/installation/6_shared_folder_0.png
new file mode 100644
index 0000000..ee6bf60
Binary files /dev/null and b/static/installation/6_shared_folder_0.png differ
diff --git a/static/installation/6_shared_folder_1.png b/static/installation/6_shared_folder_1.png
new file mode 100644
index 0000000..e3e898a
Binary files /dev/null and b/static/installation/6_shared_folder_1.png differ
diff --git a/static/installation/6_shared_folder_2.png b/static/installation/6_shared_folder_2.png
new file mode 100644
index 0000000..4016da3
Binary files /dev/null and b/static/installation/6_shared_folder_2.png differ
diff --git a/static/installation/6_shared_folder_3.png b/static/installation/6_shared_folder_3.png
new file mode 100644
index 0000000..61367aa
Binary files /dev/null and b/static/installation/6_shared_folder_3.png differ
diff --git a/static/installation/7_install_postgres_0.png b/static/installation/7_install_postgres_0.png
new file mode 100644
index 0000000..cf0c39f
Binary files /dev/null and b/static/installation/7_install_postgres_0.png differ
diff --git a/static/installation/7_install_postgres_1.png b/static/installation/7_install_postgres_1.png
new file mode 100644
index 0000000..752f046
Binary files /dev/null and b/static/installation/7_install_postgres_1.png differ
diff --git a/static/installation/7_install_postgres_2.png b/static/installation/7_install_postgres_2.png
new file mode 100644
index 0000000..f79161c
Binary files /dev/null and b/static/installation/7_install_postgres_2.png differ
diff --git a/static/installation/7_install_postgres_3.png b/static/installation/7_install_postgres_3.png
new file mode 100644
index 0000000..aeb04d8
Binary files /dev/null and b/static/installation/7_install_postgres_3.png differ
diff --git a/static/installation/7_install_postgres_4.png b/static/installation/7_install_postgres_4.png
new file mode 100644
index 0000000..60c2567
Binary files /dev/null and b/static/installation/7_install_postgres_4.png differ
diff --git a/static/installation/8_install_git_0.png b/static/installation/8_install_git_0.png
new file mode 100644
index 0000000..0972356
Binary files /dev/null and b/static/installation/8_install_git_0.png differ
diff --git a/static/installation/8_install_git_1.png b/static/installation/8_install_git_1.png
new file mode 100644
index 0000000..4314242
Binary files /dev/null and b/static/installation/8_install_git_1.png differ
diff --git a/static/installation/8_install_git_2.png b/static/installation/8_install_git_2.png
new file mode 100644
index 0000000..e1112ba
Binary files /dev/null and b/static/installation/8_install_git_2.png differ
diff --git a/static/installation/8_install_git_3.png b/static/installation/8_install_git_3.png
new file mode 100644
index 0000000..6cd33df
Binary files /dev/null and b/static/installation/8_install_git_3.png differ
diff --git a/static/installation/9_configure_git.png b/static/installation/9_configure_git.png
new file mode 100644
index 0000000..3e2aaea
Binary files /dev/null and b/static/installation/9_configure_git.png differ
diff --git a/static/installation/README.md b/static/installation/README.md
new file mode 100644
index 0000000..f82d877
--- /dev/null
+++ b/static/installation/README.md
@@ -0,0 +1,3 @@
+This folder contains screenshots
+used to describe the installation of a Ubuntu
+inside a VirtualBox machine.
diff --git a/static/link/to_gh.png b/static/link/to_gh.png
new file mode 100644
index 0000000..01f1a8a
Binary files /dev/null and b/static/link/to_gh.png differ
diff --git a/static/link/to_py.png b/static/link/to_py.png
new file mode 100644
index 0000000..53c6045
Binary files /dev/null and b/static/link/to_py.png differ