All language subtitles for الإنجليزية (تم إنشاؤها تلقائيًا)_en_0_HELP__ (for when you suck at Linux) __ Linux for Hackers __ EP3(1080P_HD)

oh

i need some help do you ever get that

feeling when working with linux

yeah all the time right now don't get me

wrong linux is

amazing but sometimes it's a bit of a

beast isn't it

like it's complex especially if you're

just starting to use it all these

commands you have to know

all the different switches and ways you

can use them help so that's what we're

doing in this video when you're in the

terminal when you're in the ceo line

you're like i don't know what i'm doing

how do you get help it's actually pretty

cool and it's right there in the

terminal i'll show you

anyways yeah let's do it right now

[Music]

welcome to linux for hackers and

everyone because everyone needs to learn

linux right

this is episode three and we're gonna

cover quite a bit it's gonna be a fun

one trust me

there are three main things we're gonna

cover in this video first i mean we're

gonna get some help right i'll show you

how to use a linux terminal

to get help with any command you're

using that way you don't feel so lost

and stupid because i

i feel that way all the time and this is

a great way to kind of help that feeling

it never really goes away but it does

help it

we're also going to take some time and

get to know our linux terminal a bit

better

learn a bit more about them and third

you know you know we're going to be

learning some new commands today

commands that will help us learn more

about the linux system we're using

yes are you ready like i've already had

like 15 cups of coffee

i'm ready how about you what are you

drinking today i don't care get some

coffee and let's do this now along with

coffee to do this you'll also need some

linux

do you have linux let me give you some

here's some free linux right now

thanks to my sponsor hack the box

academy you're getting access to a free

linux lab right now to follow along and

have fun while we're

having fun yeah we're going to use their

platform as a free linux playground just

to go crazy so yeah click the link below

get started

and no time to waste coffee in hand

linux launched

let's do this

right now now first as always we're

going to spin up our free linux lab from

hack the box academy

i'm just going to search for that

because i never remember the url

but you got the link below so go ahead

and click that and once you're logged in

launch that lab and if you have no idea

what i'm talking about that's okay go

back to episode one i walk everyone

through how to set this amazing lab up

and once you're there

watch episode two and then come back and

watch episode three anyways let's keep

going now first let's talk about mr

terminal now we've gotten to know mr

terminal pretty

pretty well so far in the series we've

used him a lot to do some cool things

let's go ahead launch him he's the green

almost yellow i'm not sure colorblind

thing up here

launch that so again you're no stranger

you know him pretty well but you can

always get to know someone better so

let's do that a few things to know about

mr terminal here real quick now first is

that he's actually not

a terminal he's a terminal emulator he's

just pretending

which begs the question what's a

terminal what's this and it's kind of

cool

i want one i actually looked on ebay to

go find some and i might get one this

right here is an old-school terminal

it's what you would use to interact with

the computer the vt100 and when you see

this and you think terminal i want you

to think

the keyboard the screen the monitor the

physical things you're using to interact

with the computer that's what that is

and that's what they had to use back

then right so now we don't have to use

that thing goodness

we have a terminal emulator a nice

pretty gui window that pretends to be

the physical keyboard and monitor now

the terminal has one job

to give us access to things like this

our commands

the things we use to interact with our

operating system now that's a key point

here and this is something that most

people don't understand

the commands and things we we use to

interact with the computer

that's not the terminal no no no that

is the shell the shell is the user

interface we use to interact with the

operating system the linux kernel the

terminal or the terminal emulator

is what we use to interact with the

shell again just kind of picturing the

terminal emulator as being

a physical device keyboard and monitor

and the shell is our ui

now there are different shells the one

we're using right now is called

bash you've probably heard of that right

bash or born against shell

it is by far the most common shell

you'll see but real quick how do you

know what shell you're

using let's find out new command time

are you ready

came faster than you thought right let's

do this now like everything there's more

than one way to find out what shell

you're using but the way we're going to

find out right now is with the ps

command

ps stands for process status and it will

simply list the processes running in

your linux box

and tell you what's up what's the status

let's try it out ps is all you need

enter boom right there we can see that

one of our processes

is indeed bash now others you might see

will be zsh

fish bat dog giraffe and i may have made

a few of those up now one that you may

not expect to be here right here in our

phone box

that blue icon go and click on that is

that blue again i'm colorblind i'm not

sure

click on that this particular shell is

powershell

now why that's special is because

powershell is windows microsoft what

many might refer to as the opposite of

linux which

it's not really the case anymore but

powershell runs on linux it's a

shell it's a way of interacting with

linux if i use that same command as

before

ps look at my process here

instead of bash it's push pwsh which

obviously stands for

powershell now just a couple more get to

know you things about mr terminal here

now first what do you call mr terminal

so you don't get made fun of in front of

the other linux gurus well the answer is

you can call them whatever you want

people say the terminal

bash the shell console even they use all

these terms interchangeably when you

launch

this terminal emulator and you start

typing away so feel free to use

any of those but if you want to be super

fancy and nerdy say actually sir

this is the terminal emulator and we're

using the bash

shell so anyways if you want to be cool

i'm not sure if that makes you cool

in my book it does now last get to know

your thing real quick

when you launch the shell you'll notice

that you already have some

stuff there stuff you didn't put there

what does all that mean

this right here your user account who

you are you'll normally see the ad

symbol like we have here and then the

host name of the linux server you're

using or linux machine whatever it is

and then you normally have right after

that

where you are in the file system what

directory you're working in

it tells you the same thing as if you

typed in pwt or pwd

to see where you are now you don't

commonly see all this mess over here

and it's not mess it's really cool i

think that was custom from hack the box

but right here is what you'll commonly

see when you launch a

shell a terminal bash i never know what

to call it your username at the host

name and where you are

and then one more last thing you'll see

right here before you start tapping in

commands you have a dollar sign

what the junk does that mean it means

you are a user it means you're logged in

as a user on the system and you may be

thinking chuck

isn't that always the case aren't you

always logged in as a user yeah but

sometimes you log in as the

root user and with that he's always

special right when your login is root

it's going to have a

pound sign there instead now you can't

demonstrate that right now on the

machine because you don't have rights to

log in as you uh the root but i'll show

you what it looks like real quick on one

of my boxes here

if i switch users to the root

bam pound sign or hashtag however you

want to look at it

because it is important to know that

you're logged in as the root whenever

you're doing things it's a handy

reminder because you do have godlike

power at that point you got to be

careful

now i feel like you and mr terminal

shell bash whatever you want to call

them

are getting along pretty well you know a

lot about them now but the whole point

of getting to know the shell is so you

can really get to know

the linux operating system so let's do

that so here we go this is going to be

quick

get your coffee buckle your seat belts

new command time

new commands time we're gonna use a ton

of them right now to get to know

our os are you ready let's do this

first can i see your id sir type in id

id tells you all about

you host name tells you the host name

you

name seemingly tells you almost nothing

just says linux but it tells you a lot

if you use other stuff with it

it's cool ifconfig network stuff

ip more network stuff and lots of

options

netstat the status of your network ss

session stuff ps process stuff we

already covered that who

kind of the brother command of who am i

but it tells you who else is logged into

the system

env environment variables we'll cover

that later lsblk

list blocks hard drive stuff lsusb are

there any usbs plugged in

no lsof this will list all the open

files

a lot okay did you get all that

no of course you didn't i went too fast

i went too fast because i want you to

think

i need help and right now i'm going to

show you how to get that help

so i quickly went through a lot of

commands without really giving too much

detail on those commands and let's be

honest even if i gave you every detail

about these commands you'd forget it all

by next week right

at least i would you're probably smarter

than i am but anyways if you're like me

you might need some help

to remember all the stuff you have to

remember which is almost impossible how

do we do that

to get help with pretty much any command

out there we're going to consult the man

the command is literally man oh man and

then the command you're curious about

let's say that you name command earlier

we saw you name

what the junk is that if we do that whoo

we get a detailed manual of

what the junk this command is uh

description all these switches how to

use it

it's awesome right here built into linux

i mean i can keep going here like it's

just

it's long and i'll hit q to jump out of

there to quit

so whenever you need help with any

command just consult the man

man ls man ip

man ip anyways mature

now there is another way to do this and

it's it's a little bit cooler i think

um let me clear my screen here with most

commands you can do this and i'll use

that same command as earlier you name

if you're sitting here and you typed it

out you're like huh what do i do now i

forgot

well you can ask for help right here you

can either do dash h

for help most commands will have that

and if they don't have that they'll have

dash

dash help you can usually use either of

those

and when you do that you get some help

now what's cool about this is it doesn't

give you a full printed out

novel right i mean sometimes you might

want the novel to learn about it but

sometimes you might just want to know

hey

what are the switches i can use for this

command how do i use this and that's

what this gives you now one more really

super handy thing is what if you don't

know what command you need to use

like you have an idea of what you want

to do but you don't remember the command

there's a command for that just

hopefully you don't forget this command

because then you're

you're screwed the command is apropos or

a propos

how i mentally construct that word every

time i see it

you simply type this in and you type in

what you kind of want to do like

maybe you're thinking man i really want

to find out what's plugged into my

computer usb

i forgot what the command was to list

that stuff let me just search for usb

and my commands

bam that's pretty cool right it'll do a

keyword search through the commands and

the documentation and say oh well here's

all the usb stuff

and right there at the top ls usb

perfect let's say

again like maybe i want to do some

compression stuff i don't know

so i'll do apropos i propose

compress and i'll see what i can find

and a bunch of stuff that will help me

with file compression

so i'm going to go ahead and stop the

video right here i could go into more

detail about these commands i showed you

and everything but no

no i want you to do that consult the man

get into the man page the manual

and find out about these commands

yourself use the dash dash help

dash h practice these commands and learn

how to use them for yourself

that's like really the biggest thing you

learn in linux is how to learn for

yourself

you will always encounter tools or

commands or whatever that you don't know

how to use

it's going to happen it'll happen less

as you deal with linux more but it's

still going to happen so you need to

know

how to get help so practice that right

now that's your homework and also here

on hack the box academy they're going to

give you a nice

fun quiz to test your knowledge and it's

it's a toughy you're going to have to

consult the man you're going to have to

get some help so i'm going to jump in

there and show you what it looks like

real quick

they'll give you more information about

the commands we listed don't cheat

though don't look at that

it doesn't give you too much on it but

scroll down to the bottom here and they

got some questions

if you get these questions right you'll

earn back some cubes

don't know what cubes are we'll go watch

episode one i explained it there

anyways see what you got and if you need

help that's fine comment below we'll get

you some help anyways give this a solid

try

and let me know what you think in the

comments below anyways that's all i have

today guys now i

will still have a challenge a quiz for

you to take extra above and beyond what

you see here

the first person who scores a 100 on

that quiz i'll give you some free coffee

you need it and again a huge massive

super shout out to the sponsor of this

video and this entire series

hack the box academy you can sign up for

the linux foundation's course for free

right now link below and use that lab to

follow along with this video series not

to mention they have a ton

just a ton of other stuff you can go

through to prepare yourself for hacking

this is their learn how to hack

platform so you can graduate to their

hack the box platform where you actually

hack so show them some love get signed

up and um speaking of hacking

have you hacked the youtube algorithm

today like have you

make sure you like this video hit the

subscribe button notification bell

comment below

let's hack youtube today ethically of

course but yeah

that's all i got i'll catch you guys

next time

[Music]

you