Raspberry Pi by Neural Lantern - Dailymotion

Neural Lantern

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Transcript

00:00Okay, I'm back.

00:04I have finished writing my SD card.

00:06I had a problem when the scene was paused.

00:10Basically those annoying pop-ups came back where I was like in the middle of writing

00:14to the card and the auto-mounting service suddenly decided that there was a file system

00:19there and it auto-mounted it and then it, you know, put it up onto the screen.

00:29And I think it corrupted the card so I ended up having to rewrite the card from scratch.

00:32So let me just show you real fast within this video how to disable that service.

00:42It's sudo system control, start with status and then type udisks2.service.

00:50For me, I already disabled this to get it working so, what happened, no, enabled, no, I already

00:56stopped it.

00:57Basically you just want to do stop to temporarily stop it.

01:00And then if we go back to status, it's still, it's still enabled.

01:03That just means that it'll come back on for the next boot.

01:05Okay.

01:06So if your SD card corrupted or anything like that, you probably want to start over after

01:10you disable udisks.

01:13And then if we use the parted partition editor again, we can see that SDB is still there.

01:18So that's still considered the name of our card.

01:20So now that, let's see, now that the auto-mounter is not doing anything for us, we need to mount

01:28the card ourselves.

01:28So I'm going to go into CD, actually just to double check media and then mic, and then

01:34notice how it's not mounted.

01:35So I'm going to go into CD.

01:37I'm going to go into the temporary directory.

01:38I'm going to go into that PI directory.

01:40I think I probably made that earlier on camera for you.

01:43And then I made two other directories, one called boot and root.

01:46So I'm just going to mount the, uh, oops, dev SDB partition one, which is usually the boot

01:54partition to the boot folder.

01:57Do my password and then do the same thing for partition two, which is usually the file

02:02system root folder.

02:05So first thing we need to do is go into the boot partition.

02:09So this is what the PI will see when it boots up.

02:13Um, yeah, okay.

02:17So what we need to do is, uh, make an empty file called SSH in the boot folder or the boot

02:22partition, because, um, we want to, we want to tell the PI that it's SSH server should be

02:29enabled by default.

02:30So I'm going to go sudo touch SSH.

02:34If I list it again, notice how there's just an SSH folder and that's it.

02:38There's nothing inside of it.

02:39The PI just knows the other thing we have to do is modify the startup command line here.

02:43I already did this actually, when I jumped away, I added another video.

02:48Basically you want to do, you want to edit the cmdline.txt file, and then you want to

02:53find the argument that says root weight.

02:56And right after that, you want to stick the IP address that you want your PI to start up

02:59as or start up with.

03:01So it's IP equals, and then the address.

03:04And then again, like we said before, in this video, you need to know what is the subnet

03:08of your existing network and, and you need to choose an IP address for your PI.

03:12Let's see if I actually matched what I was supposed to do, oh gosh, for the PI, um, yeah,

03:215.1.

03:22Okay.

03:23So I'll move that over to the first thing there.

03:25Yeah.

03:26So, uh, just 123 is what we wanted.

03:28So, uh, that's why that is there.

03:31So I didn't actually modify this, but you'll have to modify yours.

03:34I didn't because I have to, because I already did it.

03:37And then we'll go into the, uh, into the root, uh, partition.

03:41So we'll go into the root partition and notice how it's got like all the files and folders

03:46that you're used to seeing with Linux.

03:48Uh, so that means, you know, this is the temporary amount slash PI slash, sorry, slash temp slash

03:53PI slash root.

03:55Inside of it, there's a subfolder called home.

03:57And then there's the home directory for root, for the root account under the root folder.

04:01You could modify that instead.

04:02If you want to, I'm just going to go into the home account, sorry, the home folder, and

04:07then go into the PI accounts home folder.

04:10So notice how there's a bunch of like starter files, uh, because that's what your PI account

04:14is going to start off with.

04:16Again, notice how we're in like a deeper subdirectory.

04:19So from the PI's perspective, we're really only in slash home slash PI.

04:24Um, I already actually did this, uh, when I jumped away, I wanted to make an extra video

04:29for SSH, uh, or sorry for first boot stuff.

04:32So I made the SSH folder.

04:34What you need to do is make directory dot SSH so that you have a SSH folder in this, uh,

04:40in this PI folder.

04:42Then once you have that go inside of it and you want to make a file called

04:46authorized keys, so I did nano authorized keys like that.

04:52And then I edited it and I just put the public key, uh, of, of the machine that I'm currently

04:56on right now.

04:57This is just a virtual machine.

04:59Uh, so I guess it's fine if I share, but, um, what you want to do is generate your own

05:04SSH key.

05:05If you don't know how to do that, see my other videos, but, uh, you can print out your SSH

05:11key with pretty much cats squiggly line or tilde Swinton.

05:15And then like a slash and then dot SSH and then ID and then dot pub.

05:20So that was my public key.

05:21That's how I found it.

05:22And then, um, you know, if you don't have a key, you can go ahead and do this on your

05:26host SSH key gen.

05:28I forgot if I put this into the last segment, but you type that and you hit enter a bunch

05:32of times.

05:33And when you're done hitting enter enough, you'll have your public key there somewhere.

05:37You probably want to eventually learn how to put a password on your key, but, uh, it's

05:41fine for now.

05:43So we created the authorized keys file that basically tells the operating system, uh, that

05:48I would like that particular key to be able to authenticate as that user.

05:53And since the PI is a God user or like a root user, uh, it's pretty nice.

05:58The other thing we have to do is make sure that we set permissions correctly.

06:01If the permissions aren't correct on any of these files or folders, your SSH will not authenticate.

06:07Uh, so, so I'm going to make sure that this is a set to the right permissions for me.

06:12I usually do seven zero zero on the authorized keys file.

06:16I can't remember if six OO is fine.

06:18So I just put seven.

06:20That basically means that your current user, which will eventually be the PI user has full

06:24permission to look at that file, but nobody else does.

06:27So, uh, you can tell by the way, because on the left, there's just like a read, write

06:32execute, and then a bunch of empty dashes, meaning nobody else has permissions.

06:37So we've got to do the same thing for the SSH folder.

06:40Um, so I'm going to go, uh, you know, Chamod, if this doesn't work by itself, you might want

06:45to say pseudo Chamod, but I think it'll work because the username that it thinks is on that

06:50folder is actually the same as my current user, which is great.

06:53So I'm going to go Chamod, um, seven OO dot SSH.

06:58I know for sure you need the seven and not the six on there.

07:00Meaning, uh, the current user should be able to actually like read that directory.

07:06If it's six, they won't even be able to read the directory.

07:09So we do that just to make sure that the dot SSH file and the authorized keys file

07:14have correct permissions.

07:15And then I think we're ready to log into the pie for the first time.

07:19So I'm going to go up.

07:20By the way, if you were inside of root, for some reason, I do this sometimes sudo su root.

07:25And then I'm like, oh, let's go up and let's, whoops, let's go up.

07:30And then let's unmount, whoops, let's unmount this boot partition or the root partition.

07:36You may get an error message saying that the partition is busy

07:39because what you didn't realize was the account that you just came from

07:42is still considered in that directory.

07:45So you've got to make sure that there are no, uh, terminals or accounts or anything

07:49actually using that directory before you try to unmount it.

07:52So I'm going to go sudo, uh, oh, I got to go up one level.

07:56sudo unmount boot, umount, and then umount root.

08:02If there are no error messages, then that means the SD card is ready to be put into the actual pie.

08:07Before I do that, though, I'm going to start pinging the pie

08:11because it's fun to see the pings come online.

08:13I'm going to go 192.168.123 because that's what we chose for the pie already.

08:20In my other video that I just made, I typed like a 0.123 and I sat here forever on camera.

08:25I'm not going to edit it out.

08:28So I'm going to take the SD card out.

08:30And, uh, you can't really see my pie because it's plugged into an ethernet cable,

08:35but I'm plugging an ethernet cable into the pie.

08:38I'm putting the SD card into the pie.

08:41And then I'm going to plug power into the pie.

08:44Totally headless. Don't have to worry about very much at all.

08:46So it's got power now.

08:50It's like falling off the desk.

08:52And pretty soon now it should start responding to pings.

08:58As soon as it comes up, I'm going to log in and start, uh, finalizing the ethernet, uh, setup.

09:04There it goes.

09:06Might take like a few more seconds after this before the SSH server actually comes up,

09:10but I'm going to give it a try right now and see what happens.

09:14And remember to do pie at, because we did not make a different user.

09:18When you see this message right here, it just means that, uh, the remote is not recognized.

09:22That's a security feature. So I'm going to put yes.

09:24And now we're in the pie.

09:27So, uh, what I was supposed to do is a network manager connection show,

09:31at least this version of the pie, the latest version uses network manager.

09:34If you're watching this video from the distant future,

09:37you probably just need to, you know, use whatever tool they have instead of network manager.

09:42So I'm going to edit the ethernet connection.

09:47And I'm going to print the connection details just to double check here.

09:51It's, uh,

09:55I guess it's fine.

09:56So now I'm going to set up the IPv4 settings.

09:58So I'm going to go, uh, set ipv4.method to manual because I want a static IP,

10:05getting dynamic IPs that are also fixed is kind of like another video.

10:09I want to set the address to the one that we just put into the command line.

10:12So 1.123 and give it a 24 block, meaning it'll be considered in the same subnet with other

10:19addresses that only have the last number changed.

10:21Then we'll set the gateway to 1.1, which is the router address.

10:25Okay.

10:28I'm looking at notes right now.

10:291.1 and then we'll set the DNS.

10:32You don't actually necessarily need to set the DNS if you're, well, I don't know,

10:36maybe you probably should if we're doing static right now.

10:38Yeah.

10:39Uh, you should probably maybe try setting the DNS as your router.

10:42Cause usually your router, um, is also your DNS server at home.

10:46Uh, if that doesn't work, maybe try a different number that you can find online.

10:50This one is, I think, Google DNS.

10:52You just need at least one DNS server, preferably two or more, um, that works.

10:58So you can resolve numbers to names and your computer can go online by typing names.

11:02So for me, uh, these are my DNS servers.

11:05So I'm just going to type them in real fast.

11:08Whoops.

11:11And then, uh, you don't need to do this next setting, but I like to,

11:14I like to be able to use shorter server names.

11:18So for me, instead of typing, let me show you what this means in a second.

11:22So I'm going to say my search domain is home.

11:24Cause I have a fake domain at home called home.

11:27Most people do land.

11:29Um, you should probably double check this by saying,

11:32print ipv4, like print ipv4.

11:36Um, and then after we're done, we'll say save and then we'll quit.

11:39And then the reason I do this is if I, if I ping a server, uh, like,

11:44let's say I do router dot home for me, that's too much typing every single time.

11:49If I added that dot home search domain, then I could just ping router.

11:53And so that's, that's the only reason that I do that.

11:55It's just a little bit more convenient.

11:57So now, um, let's remove the setting that we put into the command line

12:01so that we have more freedom to modify the network in the future if we want to.

12:05So let's go to the boot partition.

12:09We're in the pie right now.

12:10So it's a little bit different.

12:11We'll go into the firmware sub folder.

12:14And then we'll modify that command line file that we had in before where we were forcing that IP.

12:19We'll just erase this so that it's no longer forced because the network manager, uh, configuration

12:25we just did should be okay.

12:27And then let's reboot, reboot the machine.

12:31Do another ping so that I can get online as soon as it comes back up.

12:35Should just take a couple seconds here.

12:36So how was your, how was your day?

12:41How are you?

12:42How are you?

12:44I think somebody let me know if I look weird in this camera because I have like a new camera

12:48with like a viewfinder or not a viewfinder, like an LCD display.

12:52I didn't used to have that before.

12:54I had the oldest, cheapest, crappiest camera you could possibly imagine.

12:57Now it's just kind of cheap.

12:58Um, but I can see my face in the, in the viewfinder, in, in the LCD, you know, screen.

13:06So I'm looking at my own face right now instead of the camera.

13:09So tell me if this seems strange or weird to you.

13:25Uh,

13:28I don't know where I cut the last video, but basically we had just set a static IP address

13:40on the pie and then rebooted it and it didn't come back online.

13:44So I had to stop the video and just try to figure out what I did wrong.

13:47And basically I forgot to tell the connection to start on boot.

13:50So, uh, what I did to fix it is I went into the SD card again.

13:55So I did another mount.

13:56I didn't mount the boot partition.

13:58I only needed to mount the root partition.

14:00And the path that you go into is pretty much this.

14:02If you're using network manager, you go into your temporary mount.

14:06So that's this first part right here, temp, pie, root.

14:09And then the file system from the pies perspective, this is the path

14:13where you can find your system connections.

14:15So, et cetera, network manager, system connections.

14:19Inside of it, you'll see a file for every connection that you set up

14:22on the fail that you just did or that I just did.

14:25Maybe this will prevent you from failing.

14:29Maybe I'll show you how to set that inside of the pie too, just to be sure.

14:33So basically we're just going to edit that connection file.

14:36Uh, there's a bunch more stuff down below, but I just kind of spaced that down.

14:40So you won't see it.

14:41What you're really interested here in this connection file is auto connect.

14:46It should have been set to true.

14:47And now if we do that, um, we should be able to unmount the card and boot the pie back up.

14:53And then it should go online.

14:55This is actually kind of like maybe a good reminder to always

14:58include redundancies as a good computer nerd, right?

15:01Computer scientists, computer nerds, we always like have redundancies in everything.

15:05What I should have done is chose a different IP address for the network manager connection.

15:11That way, if I screwed it up, the pie would still boot under the first address.

15:14And only after seeing that it booted with the new address, I could have removed the first address.

15:19But you know, I'm a little impatient and careless sometimes.

15:23So I'm going to unmount this root partition.

15:27And we'll go back to looking at the pings, right?

15:29That's the correct ping.

15:31I'm going to remove the SD card from the reader.

15:34I'm going to put it back into the pie.

15:38And then I'm going to plug in the power.

15:40Okay, now hopefully it won't take long before the pie comes back online.

15:49If it never does, you and me are going to be sitting here.

15:59Oh, please, come on, what have I done wrong?

16:02Okay, it works this time.

16:03So it was definitely the auto connect.

16:07So now I'm going to go SSH into the pie.

16:10We already saw that security warning, I think,

16:12either in this video or the other video.

16:14But what have I done?

16:18I forgot to put the one there again.

16:21Okay, so we're in the pie.

16:24First boot, first connection without even using a computer monitor.

16:27Pretty sweet.

16:28So now I'm going to go sudo network manager command line show.

16:32And then I'm going to edit the ethernet connection.

16:37Just to show you what we should have set before we saved.

16:41It would have been connection.autoconnect.

16:43So I should have said connect set connection.autoconnect

16:49connect to yes.

16:51That didn't change anything, but that's what I should have done.

16:54I mean, it would have changed something before.

16:55So now we're inside the pie.

16:58And we're ready to start setting up more stuff.

17:01So the first thing I'm going to do is,

17:03well, I'd like to change the host name on this pie.

17:06So I'm going to do sudo nano etc host name.

17:10There's a command called host name I think you can use,

17:12but I just like to set it in the file.

17:14So basically, we want to set the host name of the pie.

17:16That's not terribly useful for now.

17:19But I just like it because it shows up on the command line.

17:21So I'm going to go pi repeater dot living room dot home.

17:27Don't judge me for my silly domain names.

17:29So now the next time we reboot the pie, we'll have a good domain name.

17:34Then I'm going to do an update.

17:36So I'm going to do actually, you know what, what you should do at home,

17:39I'm going to omit this just to save time.

17:41You should say sudo apt update for sure.

17:44Everybody should do that because the local list of packages that are available

17:50needs to be updated.

17:51Otherwise, you might have a hard time installing later.

17:54It sometimes gets out of sync and it doesn't work.

17:55So we'll all do update.

17:58At home, you should do upgrade right away.

18:00I'm not going to do upgrade right now because it'll take a long time.

18:03And then after you do upgrade, you should do auto remove

18:06with a dash yes there or just type yes manually.

18:09Again, I'm not going to do that until the camera's off.

18:12And then you should reboot the computer.

18:14Or reboot the pie.

18:16Then let's install a program called screen, which gives us a virtual screen.

18:22Let me show you just real fast what this is for.

18:25So sudo apt install screen.

18:28It's just basically a virtual screen that you can work on.

18:31So if you accidentally lose your connection or something goes wrong,

18:34you can log back in and get right back to your work.

18:37So I type screen here and I'll just type like a bunch of random characters.

18:41And then I will detach from the screen and exit the pie.

18:46So imagine you lost your internet connection or your network connection.

18:49I can go back into the pie now and I can list screens with screen dash list.

18:55And then I can reattach to it with a dash R.

18:58Notice how my work is still there.

19:00This doesn't survive if the whole machine reboots, but this has saved me a few times from losing work

19:05when I was connected to a remote terminal.

19:08Okay, so now what do we have to do?

19:11The next most important thing that we have to do is install our Wi-Fi dongle.

19:17We have to actually install drivers.

19:19If you're looking at this video way in the future, I don't know, maybe the pie will handle this.

19:22But right now, as of, you know, the making of this video,

19:26this dongle doesn't work unless you install the drivers from source.

19:29So let me just prove to you real fast.

19:33How can I show the internet adapters without?

19:37Well, maybe you'll just have to trust me.

19:40At home, do this command IP, whoops, do this command IP ADDR and hit enter.

19:46And you should see two network adapters.

19:49You should see Ethernet 0 and also wireless LAN 0.

19:53Wireless LAN 0 should be already working.

19:55It's not connected yet, but it's working because, well, that's the one that's built into the pie.

20:02You want also another one.

20:05You want wireless LAN 1, like we talked about before.

20:08For that, we have to plug in the dongle and install the firmware.

20:11So, I think what I'm going to do now is stop this video and jump into another one

20:17where I just kind of talk about how to install this dongle.

20:21So, by the time you watch this video, that other video should be posted.

20:24I'm basically just going to expect that you pause this video and you go over there

20:28and you watch the video to install this dongle.

20:32If you don't have the same dongle as me, that's okay.

20:34The instructions will probably help you get a pretty good idea for how to do it yourself.

20:38And then again, if enough people comment about the same...

20:43I don't know if I said this before.

20:44If enough people comment asking me to make a video for the same dongle,

20:48I might buy the dongle and then just try to install it for everybody.

20:52We'll see what happens.

20:53So, I'm going to cut the video now.

20:55Go to the other video that shows you how to install the dongle and then we'll continue.

21:01Hey, everybody.

21:02Thanks for watching this video again from the bottom of my heart.

21:05I really appreciate it.

21:06I do hope you did learn something and have some fun.

21:09If you could do me a please, a small little favor.

21:11Could you please subscribe and follow this channel or these videos

21:16or whatever it is you do on the current social media website that you're looking at right now.

21:20It would really mean the world to me and it'll help make more videos

21:24and grow this community.

21:25So, we'll be able to do more videos, longer videos, better videos,

21:28or just I'll be able to keep making videos in general.

21:31So, please do me a kindness and subscribe.

21:35You know, sometimes I'm sleeping in the middle of the night and I just wake up

21:38because I know somebody subscribed or followed.

21:40It just wakes me up and I get filled with joy.

21:42That's exactly what happens every single time.

21:45So, you could do it as a nice favor to me or you could you could troll me

21:48if you want to just wake me up in the middle of the night.

21:49Just subscribe and then I'll just wake up.

21:52I promise that's what will happen.

21:54Also, if you look at the middle of the screen right now,

21:57you should see a QR code which you can scan in order to go to the website,

22:01which I think is also named somewhere at the bottom of this video.

22:04And it'll take you to my main website where you can just kind of like see

22:07all the videos I published and the services and tutorials and things that I offer

22:11and all that good stuff.

22:13And if you have a suggestion for clarifications or errata

22:20or just future videos that you want to see, please leave a comment.

22:23Or if you just want to say, hey, what's up?

22:25What's going on?

22:26You know, just send me a comment, whatever.

22:28I also wake up for those in the middle of the night.

22:29I get, I wake up in a cold sweat and I'm like, it would really,

22:34it would really mean the world to me.

22:35I would really appreciate it.

22:36So again, thank you so much for watching this video.

22:40And enjoy the cool music as, as I fade into the darkness,

22:46which is coming for us all.

22:58greata video.

22:59Take care.

22:59If you....

23:14Yeah,

23:15thank you so much for watching.

23:18Take care.

Headless Raspberry Pi Setup: SSH, Static IP, and WiFi Dongle Guide

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Raspberry Pi

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