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Changing gears shall prompt your share from the environment variable here provides you with useful information,

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such as the user you are operating as and the director in which you're currently working.

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So the default should prompt in color text the following year.

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Users here can use their name, first name and current, uh, current directory.

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So if you're working with the real route user, this translates to this, for example, root at Cowley

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and Core and Directory.

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So you can change the name in the default shopfront by setting the value from the Florida is one variable

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that so the is one variable has set of placeholders for information you want to display in the prompt,

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including the name of the current user, the host name and the base name of the current working directory.

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So this is very useful if you happen to have shows on multiple systems are a little bit on an as multiple

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accounts.

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So by setting different users and host names and values for different channels or accounts, you can

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tell at a glance who you are and what your current system is.

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So let's have a little fun on showing the prompt in your terminal.

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For example, you could enter here.

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Pierce one.

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Here, uh, for example, uh, World's best anchor here and his shtick here.

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As you can see here now, our common theme is like that here.

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So now every time you use this terminal, you will be reminded that you are the world's best hacker.

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But any subsequent terminal you open will still have the default command ground because the P is one

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variable only those values for your terminal session.

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Remember, until you export a variable, it is only good for that session.

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So if you really like this new command prompt and want to see it in every terminal, you need to take

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a unit to export it.

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So like that, export P.S. one.

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But I will not do it in this year, so this will make the chains so chain dependent across all sessions.

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How about a little more fun?

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Here's the thing you really want your terminal to look like the Windows CE in the prompt.

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So that's actually it's quite boring actually here.

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So say you really want your terminal to look like a windows in the prop.

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So in this case, you can't change the prompt name you see and keep it down below.

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Have to control your current directory as here, for example, export.

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Export p es from excellent experience one.

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And here in this film, we see him here, so we see and hear, you know, override Tableau for directory

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extrication, as you can see here.

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Here.

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Like there.

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We can do it for some severe bone loss.

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Like that, so having a prompt from your current director, it can be generally useful.

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So particularly for beginners.

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And so it's something to consider when you change your form variable, we can change pet as well.

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So one of the most important variables in your environment is pets.

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Variable, actually, it's boring, actually.

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So let's call it so one of the most important variables in your environment is your pet variable.

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So which controls were very on your system your shell will look for come once you enters, such as a

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see the list or equal here.

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So most commands are located in Espin or bin directory here, like a user locale, spin or user.

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Uh, use local being yeah.

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If the file doesn't find the command in one of the directors in your pet variable, it will return the

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command not formed like that, for example.

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Common would and liked it.

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So even if that comment does exist in the dire straits and, uh, not in your pet, so you can find

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out which directors are stored in your pet variable by using Echo and all our sign and pet.

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That's true.

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How serious are Patea?

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These are the directories where your terminal was searched for any command.

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When you enter L.A., for example, the system knows to look in each um, each of these directories

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for the L.

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S Command and when it finds out as, uh, the system executes it like that was.

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So each territory is separated by column, and you don't forget to add the dollar symbol in content

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pattern, as you can see here.

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So we can add them to the patch variable here.

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So you can probably see why it is important to know what is in your patch variable if you downloaded

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and install the new tool, let's say, for example, new hacking tool here, uh, into the root new

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hacking tool directory.

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You could only use commands from that tool and you are in that directory because the directory is not

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in the path variable.

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Every time you want it to use that, all you called you will first have to navigate routinely new hacking

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of which is a bit inconvenient if you want to use tool often.

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So to be able to use this new tool for any directory, you need to add the directory, uh, to holding

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this tool to your path variable to add new and you hacking tool to your pet's variable.

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Enter this command paths here equals here to our path and to that column here.

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And, for example, route new hacking tool.

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Here we added path variable here.

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So this assigns the original patch variable plus this the folder here directory to path to the new path

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variable.

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So the variable contains everything it did before, plus new tool directory.

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If you examine the contents of the patch variable, uh, again you should see that this directory has

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been appended to the end of the path, as shown here and Equal Partner X.

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Echo what, Pat?

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So you can see where that is, uh, a rule, it's new hacking tool here.

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So now you can accept new hacking tool applications from anywhere on your system rather than having

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navigate to is selected in the Bachelor.

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Look in our directories list for your new tool.

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So how not to add that valuable?

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So one mistake commonly made by new Linux users is assigning a new directory, such as the root new

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hiking tool to the patch variable like that had.

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Uh, here, uh, route new directory.

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New hacking.

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Look at this view, if you use this command, you'll pack variable will only contain the new hacking

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tool.

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So your pet variable will not contain this and you will delete all of these pet variables and only add

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this.

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This is useless.

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Uh, fortunately.

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So um.

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And no longer contain the system binaries directories such as being on the scene, so after doing this

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command, you cannot use LCD or any comments here.

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So when you then go to use any of these comments, you will receive the error command not found here.

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So remember that you want to append to the pet variable, not replace it.

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So if you are in doubt, send the contents of the variable somewhere before you modify it.

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So.

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We can create a user defined variable as well, so you can create your own custom user defined variables

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in Linux by simply assigning evaluate will be a new variable that you name.

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So this may be useful when you are doing the same as some more advanced scripting or find you are often

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using a long common that you get tired of typing over and over.

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So the syntax is straightforward enter the name of your variable, followed by assignment, assignment

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symbol and then the value to part in the variable as here, for example, my new variable and.

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Uh, here and for example, hacking is the most valuable, valuable skill set in the twenty first century.

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You.

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So this assigns a string to the variable mine environment, so to see the value in the VAT in that variable

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and use the Echo Command and the dollar content symbol to with the variable name, as we did earlier

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here.

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My new variable, which?

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As you can see, they're just like our system environment variables, user defined variables must be

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exported to persist to new sessions.

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So if you want to delete these new moneyball. or any variable use that on set on onset myname variable

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here.

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So now it's equal.

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And as you can see, we have no new variable pitch.

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So.

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You mean, because we deal with this variable with Ansett command and have to, uh, press and equal

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for printing to tomorrow?

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We can't see it because there is no credibility here.

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After all, setting this variable.

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So lastly, you might find in white, I'm afraid it was foreign, but it's worth getting to know them

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so they control how your working environment in Linux looks, acts and feels so you can manage these

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variables to tell in your environment, to your needs by changing them, exporting them and even creating

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your own, as we did in this case.

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So in some cases, these they may be useful for covering your tracks as a hacker.