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‫Welcome back.

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‫In this lecture, we will install MongoDB on macOS.

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‫Now, if you're a Windows user,

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‫then please mark this video as completed,

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‫and move on right to the next one

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‫because the installation process

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‫is actually quite different on Windows

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‫than it is on Mac.

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‫So fire up your browser,

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‫and open MongoDB.com.

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‫Okay?

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‫Then, move to products.

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‫And then over here, the MongoDB server.

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‫So, open that one up.

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‫And so that takes us to the MongoDB download center.

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‫So the one that we want is the MongoDB community server,

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‫and then of course, the current release.

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‫So not the more experimental four point one.

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‫Then, your OS should automatically

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‫be selected as macOS.

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‫And then the package.

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‫This is the only option anyway.

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‫And so, hit download.

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‫And then wait for it to complete.

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‫Now while this is downloading,

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‫notice how the website here talks about MongoDB Atlas

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‫which is Mongo's database as a service.

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‫So basically, it's running MongoDB in the Cloud on Atlas

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‫instead of running it locally.

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‫And actually, later in this section,

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‫that is exactly what we're gonna do.

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‫So we will create an Atlas account,

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‫and run our database in the Cloud.

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‫Okay?

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‫So in this video, we're downloading and installing

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‫the local version of MongoDB,

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‫which we will use to get familiar with the database system.

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‫But then, by the end of the section,

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‫we will actually transition to the hosted version,

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‫and that's the one we will then use

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‫in our real application until the end of the course.

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‫All right.

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‫And with the file now downloaded,

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‫let's go ahead and extract it,

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‫and take a look at the content.

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‫And what we need here is basically

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‫these executable files here.

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‫And what we need to do with them

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‫is to copy them into a special binary folder

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‫that we have on our system.

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‫Okay?

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‫So let's move into our terminal and do a copy command,

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‫and we're gonna need some permissions forwarded,

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‫so I'm starting with sudo here.

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‫Then cp for copy.

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‫And now, I'm gonna go add and drag

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‫all of these files in here so that

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‫I don't have to write the path to them out.

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‫Okay.

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‫So that's all of the files that we're gonna copy.

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‫And we will copy them into a folder

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‫called slash usr local slash bin.

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‫Hit return on that, and just to make sure

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‫they're actually there, let's actually go there.

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‫Usr local slash bin.

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‫Take a look at the files there.

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‫And indeed, here they are.

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‫So basically these red files are the ones

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‫that we just copied there.

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‫So these aren't executable.

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‫Now since we're in this folder,

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‫you might actually see some other interesting stuff here.

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‫For example, there's nodemon command here.

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‫That is the global nodemon package

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‫that we actually installed before.

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‫I mean, it's not really the package itself,

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‫but it is this what allows us to run

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‫the nodemon command globally.

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‫Next up, we're gonna create a folder

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‫where the database can then actually store the data.

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‫And again, we're gonna need permissions for that.

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‫So mkdir to make the new directory,

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‫and then slash data slash db.

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‫Hit return.

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‫And in my case, this folder actually already exists.

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‫And so, I'm not able to create a new one.

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‫But in your case, I'm sure this worked just fine.

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‫Next up, we need to give some permissions

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‫in order for the database to be able

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‫to write in this folder.

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‫And so for that, again, we use sudo.

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‫Then this weird command here, chown, or whatever.

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‫And R for recursive.

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‫Then id minus un and slash data slash db.

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‫All right.

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‫So this looks a bit like black magic here,

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‫but again, just follow this recipe

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‫in order to just make this work.

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‫Anyway, we should now be good to go.

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‫And call mongod.

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‫So let's try that out.

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‫So let's make this window a bit bigger.

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‫And so indeed, we now have the Mongo process running here.

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‫Okay.

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‫So it starts up here.

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‫And then gives us all the stuff that we don't really need.

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‫And by the end, it tells us that it's waiting

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‫for connections on port 27017.

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‫Okay?

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‫So this here is basically like a Mongo server.

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‫Okay?

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‫So this means that MongoDB is now running in the background.

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‫But we need to now actually connect to it

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‫in order to create new databases,

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‫and create new collections and all that good stuff.

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‫Okay?

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‫So in this terminal window,

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‫we will leave this process running.

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‫So basically this MongoDB server.

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‫And we then open another tab,

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‫or you could open another window.

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‫But I just use command t to open another tab.

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‫And now, we run the Mongo shell

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‫simply by writing Mongo.

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‫All right.

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‫And we are now connected to our MongoDB server

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‫that is running on local host on the default port

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‫that I just mentioned before.

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‫So this one.

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‫Okay.

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‫So we are now connected to that,

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‫and so let's now write db here,

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‫which should return the task database.

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‫And it did.

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‫So.

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‫We have a test database already on our computer.

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‫And so this means that it works.

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‫So, great.

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‫Now we could have used this Mongo shell here

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‫to also connect to a remote database.

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‫So, remember how in the beginning,

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‫I talked about the MongoDB Atlas

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‫which is basically a database running in the Cloud.

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‫So a remote database.

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‫And so here, we could use this MongoDB shell

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‫to also connect to that one.

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‫But if we simply run the mongo command like we did here,

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‫it will just automatically connect

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‫to the local MongoDB database

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‫that is running on local host.

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‫Okay.

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‫So that's it for this video.

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‫In the next one, we will then create

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‫our first new database, and start

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‫to interact a little bit more with this Mongo shell.