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OK, so we have covered a few comments in the last video.

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Let's learn a little bit more just so we can feel confident when we get to use the word terminal later

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in the course.

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Another important comment that you will use a lot is called pseudo.

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Now, pseudo allows us to run certain commands as truth account or in other words, as an administrator

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account.

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For those of you who don't know, Ruth account on Linux is something similar as administrator on Windows.

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So let's check Suda comment by running it with another familiar comment that we already covered, which

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is touch comment.

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So if I typed this pseudo and then touch and then file one, let's see what will happen.

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So I'm just going to press enter.

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Hmm.

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It asks for password, which makes sense because we're actually trying to create a file with elevated

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privileges.

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So the actual password that you want to type here is the same password that you used once you created

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an account during the installation of Linux.

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So I'm just going to type mine right here.

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And the file has been created.

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We can check it by typing Allez.

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And now that we created file one with elevated privileges, you will also notice that on desktop, if

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I lower my terminal, this file one has a lock on its icon, as we can see right here.

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This means we cannot change content of the file as a regular user.

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Let me show you what I mean.

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If I also go and create a file as our Mr. Hacker can't just be typing oops, just by typing touch and

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then file to.

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Here, if we take a look, this falta won't have any locks on its.

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This is a file that we created is a regular user.

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OK, we'll get back to this in just a second.

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For now, another useful comment that I want to show you is called Nano.

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Nano is a text editor.

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Once you open a file with Nano, you will be able to write text there or even code if you're creating

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a program.

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Let me show you how it works.

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So if I go to my terminal and I type Nano file two, which is the file that we just created, it will

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open a window that looks like this here.

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We can write anything we want.

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Let's say we want to write Hello World.

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How is your day going?

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OK, just a simple sentence.

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We can save this and then we can see whether we managed to write it using the cat comment.

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So to save a file in the nano editor you type control.

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OK.

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Then once this pops up, you press enter and then you can press control X to exit out of Ed to make

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sure that we typed something inside of our file.

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If we can catch it like this or cat file too.

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And here we have our sentence.

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Hello, world.

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How is your day going?

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OK, but if we try to do the same thing with file one.

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It will open this window, but as you can see, it wont work, it will tell us down below that this

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file is on writable, as we can see right here.

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Why is this?

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Well, this is because we don't have enough privileges to change the contents of this file or to write

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any new content.

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Remember, we created it with pseudo comment.

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So how can we write to it?

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Well, we can run now with the comment.

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Let me show you what if I type pseudo now and then file one.

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Now it works, we don't get the error down here and we can also type something like today is Tuesday,

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we can save it with control.

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Oh, press, enter and then control, exit to exit if we can't find one.

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Now, we also have the content written inside of our pseudo.

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So this is a way that we can actually create the file that cannot be accessed by a regular user.

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You would need pseudo privileges to open and write to that file.

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OK, but there is also another command that we can run to elevate our privileges.

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And this command is called pseudo s you.

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If I type pseudo pursue this comment instead of elevating our privileges for just one single command

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that we want to run, this will give us growth account terminal.

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As you can see right now, we have Mr. Hacker terminal.

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But if we run pseudo you.

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Now we get Ruth terminal.

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We see it's not really the same, we have Mr. Hacker right here while as here we have Ruth name and

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we get this cool call.

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I come right here.

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But be careful while using root terminal, because with this terminal, you can actually delete any

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file that might be crucial for the operating system or you can make any changes whatsoever.

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There is no limitation.

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You can delete the entire operating system if you want, so only use this one, you know what you're

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doing and when there are a lot of commands that you need to run with SUDO.

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So in that case, you can open the root terminal and run those comments and then exit out of the terminal.

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Now, you might be asking, well, how can I exit once I entered?

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Well, it's simple as that, simple as typing exit and we get back Mr. Hacker account.

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And let's also mention the last comment for this video, probably the one that you will use more than

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any other comment, and that is clear now clear simply does as it says, it clears our terminal window.

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Perhaps you ran too many commands and you're looking at a lot of output that you no longer want to read

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or you no longer need it at all.

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Well, simply by typing clear and pressing enter, we can get rid of all of that and get fresh and clean

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terminal window.

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Awesome, you're starting to get a hang of this, as you can see, terminal is not that hard to use.

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It will take some time for you to get used to these commands, but eventually it will become second

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nature for you.

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OK, so there's one more video to cover for terminal.

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And we're left to cover some other comments aimed at networking and discovering our IP address and so

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on and so on.

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So practice a little bit with these comments that we already learned in past videos, and I will see

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you in the next one.