diff --git a/INSTALL.md b/INSTALL.md deleted file mode 100644 index 133f144..0000000 --- a/INSTALL.md +++ /dev/null @@ -1,474 +0,0 @@ -# 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 9bb1776..5e54d28 100644 --- a/README.md +++ b/README.md @@ -3,42 +3,5 @@ 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/)** (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*. - - -## Contributing - -Feedback **is highly encouraged** and will be incorporated. -Open an issue in the [issues tracker ](https://github.com/webartifex/intro-to-sql/issues) - or initiate a [pull request ](https://help.github.com/en/articles/about-pull-requests) - if you are familiar with the concept. -Simple issues that *anyone* can **help fix** are, for example, - **spelling mistakes** or **broken links**. -If you feel that some topic is missing entirely, you may also mention that. -The materials here are considered a **permanent work-in-progress**. - - -## About the Author - -Alexander Hess is a PhD student - at the Chair of Logistics Management at [WHU - Otto Beisheim School of Management](https://www.whu.edu) - where he conducts research on urban delivery platforms - and teaches coding and data science courses - based on Python & SQL in the BSc and MBA programs. - -Connect with him on [LinkedIn](https://www.linkedin.com/in/webartifex). + based on the free and open-source database [PostgreSQL ](https://www.postgresql.org/). diff --git a/static/installation/0_create_vm_0_download_ubuntu.png 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