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What exactly is legs, so legs is an open source free alternative operating system that can run pretty

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much any hardware.

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So if you have, like an old laptop somewhere, you can wipe it clean and put Linux on it entirely free.

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Typically, Linux is very lightweight and it's very secure by default.

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Of course it has vulnerabilities, but it's a little bit more secure than other systems by default.

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And then also it's typically a command line focused.

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But you can also, you know, get a distribution of Linux that has, you know, Buist.

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So there are hundreds of different flavors as people call in the industry.

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These are just different versions of Linux and you can just search for them on the Web and you can find

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them and see which one, you know, fits you the best, but the one we're going to be using for this

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horse and that you would most likely be using, you know, if you were doing this.

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Hacking is calling Linux, and it's designed primarily to be used for penetration testing and ethical

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hacking.

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So let's just go over some of the basics and Linux, you know, so the terminal.

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So a lot of the things that you're going to be doing, Linux, is going to be in line, especially with

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politics and hacking stuff.

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So you're going to have to get used to it, you know, get used to staring at the black box.

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All right.

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And just the lines and lines of code type stuff now so that you're not really going to be looking at

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just going to be looking at the different demands and outputs from it is not anything to say.

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Don't worry, we're going to get into Astarte, very basic.

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So to access the command line, you're going to need to open a terminal.

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So in what you're going to want to do is click that black box you see up there that has a white outline

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on it and it's going to open up a terminal from that terminal.

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We entering commands.

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So I have a list of some of the basic Linux commands that I want to go over, which you guys there's

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a handful of commands that you need to know.

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You don't have to be like a Linux master to become an ethical hacker.

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But there are some commands that you really do need to know.

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And, you know, just note that Linux is case sensitive all the time.

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So make sure that you're inputting commands exactly how I, you know, show the show, you know.

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So just to briefly go over some of the commands.

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So who am I to username the current user hostname press the hostname or device puede press the current

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directory that you're in, which is just a folder else list out the contents of the current directory

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that you're in could followed by the directory name.

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It changes to that directory.

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Dot backs up about one directory.

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So like if I'm in the homeslice user folder, if I post CD enter, it'll take me back to the home folder.

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OK, so my dear.

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And then a directory name.

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So this creates a new directory, R.M. file name at least the file name that you indicate right there.

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And then there's RDR delete the least integrated directory Asou Dasht username.

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It'll allow you to switch users like in Windows.

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We typically have to log in and out in Linux.

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You do a command line and it's very, very quick.

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You can just as you dash use the name and then you're good to go.

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But in the past what are you good suto.

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And then any command excuse that command with room privileges, which is the same as administrator privileges

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of a pseudo dashi, allows you to switch immediately to the root user account.

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And history shows a list of all the reasons commands that you have executed.

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So I have config prints out the IP address and network interface information for the system.

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And then S.H., MIT and ABC right there is going to be like it's going to be three numbers by the there

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of a placeholder and then the filename so that I'll change the permission of the indicative file and

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we're going to go over that.

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So now let's go over to our colleague, the next machine and actually try some of these commands.

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OK, so we're the home screen of our colonics machine.

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So this is the terminal box right here.

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So click on that and then it should open up a terminal window right here.

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So let's go to the commands that we, you know, just went over and I slide really quickly.

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So you type in where my inner ear tells me that's my username to see the current username.

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You know, the answer to that executed that command.

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So now let's try the hostname command post.

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They remember I name this this box tally.

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So, of course, so puede present working directory.

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This tells me that I'm currently in the home county voter and if I wanted to see what was in here,

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I'm not sure there's anything in here.

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There is so less and less of the contents of the directory.

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You can add different switches on else I like to do play.

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It shows all files and lists them out like vertically and shows permissions as well.

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So that's something that I like to do.

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Something you will probably find useful as well as other Haggard and then so let us see it as a blessing

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in.

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So if I want to change to the documents, folder, its CD documents, and then switch to documents for

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voters to affirm that Puedes when Homeslice counted such documents.

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So now if I wanted to go back because the SAS should have on record a CD space dat dat and now I'm back

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in homes like California.

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There you go.

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So if I want to make a directory called, you know, hacking tools will do mediaa hacking tools.

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And now if we do, unless we see that as a directory there with the switch to it's a CD hacking tools.

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So that's pretty cool.

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So that's backout.

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So let's say that we wanted to remove her file, so I'm just going to make a fire really quick.

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This is another listener.

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It's called Touch and then a text file.

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It just makes a file.

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So Nici test file right there.

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So what we can do, we can remove this test file.

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So if one deleted because it was a mistake, you know, R.M. and then test file and now test files is

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no longer.

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There you go.

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So now armed are the other remove function we can take.

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We can get rid of the hacking tools that we need.

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Oh and also at any time with Lennix, this is a quick little nugget.

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You can hit tab when you starting to type things and it'll autocomplete it for you as very useful.

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We don't need trying to rush or it just makes things a little bit easier and you get into the flow a

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lot.

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You'll start seeing that using the tag function a lot.

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But anyway, so armed you are hacking tools is no longer there.

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So now let's say I wanted to switch to another user.

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I don't think I'm another user here, but let's see if DSU Caleigh and then you put in a password,

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super secret password and it switches to that user.

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I don't think I have any other uses on here, but we can do a pseudo dashi and this will allow us to

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switch to root them.

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And now I'm the root user.

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And if any time you switch users or anything or you switch to room, you just type in exit and you can

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get right out of it.

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So also, if I wanted to do like let's say like this directory here, I can see right now and list out

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the directory, everything is in it.

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But if I didn't have rights to this folder, like maybe it was owned by Rupert and I couldn't see any

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of this stuff and I couldn't I could see this coming in here, I would do a pseudo command and then

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I would do less.

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And typically the pseudo command will also, depending on how your system is set up, it'll ask you

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for your password, but it doesn't always do that.

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But also note that when you do, you suto in last, I'm not sure the exact time interval, but it lasts

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for a good while after you do Souto and then you want to do it again for a while until you don't execute

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any commands for a while.

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So moving on to the next command, let's say we want to see what we've been doing because there's something

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I did earlier that I need to doing in because I need to see it.

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This is very helpful.

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So you type in the history enter and it shows you the history of your commands.

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So then I have config, which is going to show us our networking information.

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So the way this county VM is set up is different than the older ones.

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You actually have to do pseudo.

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I have config and then it'll show you everything is set up a little bit more secure than the older ones

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were.

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So we have to destroy disruptively then.

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You might not have to do that.

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But the way they set these, you have to.

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So now let's make another five really quick because we are in homeground, so let's make another file.

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So touch test file too, just because so we see test pilot who is there and we see sorry else.

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Just so sometimes it gets a little bit overwhelming.

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We do.

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l'Est, L.A. so with the test file too.

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So you can see that the owner of the file, which is Calli, we see equally twice.

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So the first one represents the owner of the file.

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The second one represents the group that the file belongs to.

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So the owner of the file has read write access, which is represented by the RW that you see there.

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And the group actually has read access and then everyone else has read access as well.

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So this is typically how you'll see Linux permissions and that's how you would interpret them.

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So we can change these permissions, if you want, with the C H Marchman.

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So besiegement and then those numbers I talked about before where the ABC was the placeholders.

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So let's say we want to make sure everybody can see and read this file and executed if it's the executable

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file, we my 777 and then test file two and now Tesfai to execute a moulis when it color changed.

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And now everyone has read, write and execution access accessing look are more specifics of the Linux

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permissions.

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I'm not going to go over them in detail here.

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Gonna confuse me, but I'll include something in the resources for you guys to be able to go learn a

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little bit more about Linux permissions, because it's something that's very important to learn as well.