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So let's take a break from the theory now and let's simply get started.

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Let's install mongodb

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locally for now

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and let's connect to it and see how we can work with it.

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Now mongodb runs on all operating systems,

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Mac, Linux, Windows, on all three operating systems,

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you can go to mongodb.com and on that page, click on get

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mongodb in the top right corner, that will allow you to download the mongodb installer and install

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it locally on your machine.

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Now there by default,

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it selected this atlas thing,

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that is something we'll dive into later in the course,

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for now let's use the free community server.

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Now the enterprise server would be your paid solution,

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we don't want to use that, we'll use the free one which gives us everything we need,

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the enterprise server just adds some enterprise level features like different kinds of authentication

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and encryption which we don't need here,

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so let's go with the community server and then there, choose your operating system in case it's not pre-selected

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correctly.

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Now there, you can go with the default version that is installed and then you can click the download

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button,

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by the way also always check the installation instructions where you find a link to here

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if you're facing any issues. So now I'll download that

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and you don't need to sign up here, you can just wait for the download to start

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and once the download finished, you can on Mac and Linux simply extract that file that was downloaded,

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on Windows you can start the installer. Now if you have that installer, simply walk through the different

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steps there and choose custom

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when you have the chance for it. Now there you can leave the defaults as they are,

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I just want to inform you that on Windows, mongodb will be installed as a service as you can see

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here.

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Now you could uncheck this but this is fine,

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this is a little different to how it will then run on Mac and Linux

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but you can follow along, fine in both cases and I will of course show you how to connect to it

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in both scenarios.

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So simply click next and install and install it on windows in the destination you chose. On Mac and Linux,

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you simply have that extracted folder here and now you can grab all these files in that folder and

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copy them into any place on your operating system where you want to install mongodb so to

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say,

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so there, I will go to a folder I prepared and simply paste that into here.

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Now the bin folder is the important folder,

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this has all the mongodb related executables,

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most of them you'll not really need for this course but we will work with a couple of them to start

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our own mongodb server which then hosts our mongodb databases,

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we'll also use the one for importing data at some point in the course and we will use the shell client

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which is a client that allows us to connect to the mongodb database and run commands on it

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and on Windows, you get the same executables in your installation path

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by the way. Now with these files being placed in the path or in the place of your operating system where

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you want them, you should do something else on Mac and Linux,

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you should go to your root folder on your system and there, you should create a new folder named data

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and in that folder, create another new folder named db and you can do that on Windows too if you want.

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You don't need to but you should create that folder at some place in your operating system,

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it can be anywhere,

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doesn't have to be the root folder but it will be easier to follow along for the rest of the course

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if you use that

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but I will also show you how to start mongodb when you use a different folder or a different path.

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So create that data db folder if possible in your root folder of your Macbook, of your computer, of

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your laptop or create it in any other path,

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I will show you how to make it work with both.

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Now with that, start your terminal or on Windows, your command prompt

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and this is where we'll work in for the majority of this course because there, we can run all these important

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queries or commands to insert or to retrieve data but of course, I will also show you how to then apply

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the knowledge you gain in here in a real app,

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I'll actually do this in this first module already. Now in there,

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try running mongo and you should get a command, not found error.

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Now on Mac and Linux, you fix this by going into your user folder and then look for a bash profile file,

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if you don't have that file, you can simply create it, .bash_profile,

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you can then edit this with a text editor and in there, you need to change your so-called path variable

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or you need to enhance it or you need to append something to it.

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You do this by adding export, starting with a lowercase e, path equal and then use the path to the folder

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where you placed your mongodb binaries in,

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so in my case this is in here and you can simply right click on that item, on that executable and copy

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that path here if you want and move that path into here, starting with one slash

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and in my case it's users, my user name, development, mongodb binary because that is the path I use

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to place mongodb in. Now important on Mac and Linux, to make sure that all your other commands work,

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you need to add a colon and then $path at the end and then save your bash profile file.

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Now on Windows, you also need to set this and you do this with a so-called environment variable,

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so simply press the Windows key and type environment and you should be suggested this option of setting

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environment variables at some point. Open that and there under your user variables, you should also choose

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the path variable, edit this variable and then add a new entry here which is the path to the directory

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where you installed mongodb and there to the bin directory as well,

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so always to the directory where all these executables can be found in. Simply copy that path and add

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it to the path variable and then simply save that.

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The same is true here for Mac and Linux, save that edited bash profile and thereafter, close

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all terminal or command prompt instances

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you need to restart both. Once you restarted your terminal or command prompt, you should be able to run

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mongo

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and it should give you an error that it can't connect,

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on Windows it will connect because mongod is running as a service there already, so the mongodb

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database server started as a background service because we checked this during the installation,

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so on Windows, you now probably already are connected.

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Now therefore on Windows, to also see how you could start it differently

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and I will have a whole module in this course where I talk a bit more about this shell and connection thing

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but on Windows, you can close that command prompt and start a new one as an administrator by right clicking

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on the executable and choosing run as administrator

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and there, you can now type net stop mongodb written like this and this will only work on Windows,

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don't do it,

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don't try it on Mac or Linux.

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This will stop that background service and now we can also start the mongodb server manually

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just as we do it here on Mac and Linux.

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You can now start your server by typing mongod,

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so mongo basically is a client which allows you to connect to the server and then run commands on

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your databases,

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mongod starts the mongo database server. So mongod is now a command you can use and when running it, it

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might fail.

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Now it might fail if you chose a different data

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db folder,

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I mentioned it would be easiest if you use your root directory so the C-Drive on Windows or if you use

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that route directory on Mac and Linux for the data db folder.

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If you use a different folder, you need to start your mongod instance here by typing mongodb

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--db path and then the path to the place where you created your data db folder.

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If that path includes some whitespace in there, you need to wrap it with curly braces,

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so for example here, I could type data db, that is redundant though that is the default where it looks

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for anyways and that is the path I'm using it here in my operating system, the default as suggested

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and on Windows, you can of course also add it in the same way to make sure you point at the folder where

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that data is stored. On Windows

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actually, I need to change that because there, the default path is inside of the installation folder of mongo

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database

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and then you start the mongodb server like this.

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Now if you type this, it should now start up,

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if you still get an error on Mac and Linux, simply try running sudo in front of this entire command,

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this will give you the right permissions to store data in that path.

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You are prompted to enter your password then and then it should work, on Windows this is not required

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and also not available.

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Now with that, the mongodb database server is up and running. On Windows, you don't need to do that,

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after restarting your system, the mongodb service should be running in the background again and you

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can absolutely use that, it's same server, just automatically started in the background. On Mac and Linux,

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you have to start it manually for now,

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I have a whole module where I dive deeper into that and explain how to start it as a service on Mac and

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Linux too.

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So now with that up and running,

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open a new window, a new terminal or command prompt window and leave the old one running,

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you need to leave that process running as long as you work on it because that is your running database

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server,

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if you shut that down, you can't work with it anymore.

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You can always quit it by pressing control c, this will quit and simply exit

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but then you need to restart if you want to work on it again.

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So in that new window, you can now run mongo and this will automatically connect to the running server,

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so now you are in the mongo shell which is the environment where you can run commands against your database

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server, where you can create new databases, new collections and most importantly, new documents.

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And this is now what we'll work on in the next lecture.