Transcripts
1. 1 Course Introduction: Have you come across
the term SSH, secure Shell while working
on any of your projects. And are you wondering, what does SSH time for? What are the basics
of intersect, and how does the SSH
mechanism works? Then this course is specifically meant for beginners
like you who are new to SSH terminology and
don't know anything about SSH. So this course is going
to help you in order to understand about
the basics of SSH. This course is just for
the beginners who want to learn essences at the
beginning of your career, just to know what is SSAS, how we can generate the SSH keys and basic concepts
involved in the SSS. Here is the short beams on the contents covered
on this course. We are going to discuss
about the basics of SSH. What is SSH? What is the
algorithm which drives the SSS? And how the authentication will happen and establish that take your channel or
the tunnel between the client and the
server so that they can communicate securely
over the web without the security database or any other threads
from the third party. We're going to learn
in detail how we can generate SSH key pair, that is private and public key. As SSS is going to make use of asymmetric encryption
standards over here, we're going to
learn what does it stand for shortly
in this course, we will learn how
we can generate the SSH key pair on Windows, Linux, as well as on the Mac. Mac specifically, we own power. We will explain the
concept with the help of Linux terminal that will
hold true for Mac as well. So both are having the terminal. So on Windows we will
make use of couple of applications and demonstrate
how we can make use of SSDs. The end of this
course, we will have hands-on on how we can SSH into the server from our client
machine with the help of private key as well as
with the help of password. But the concepts we will learn with the wide adoption of cloud, that is AWS, Google, or any other Cloud platform. We're using SSH heavily in order to login to a
remote servers and carry out the
operations available with resources on that
particular Cloud Platform. We hope you would enroll for this course and
learn along with us, what does SSH mean and how we
can generate SSH key pairs, and how we can login to the
service from the client. So without wasting much time, let's begin with the workforce.
2. 2 Overview of SSH (Secure Shell): In this class, we
are going to learn about the basics of SSH. What does SSH time for home? Ssh works. And what is the technology
which drives this SSH? What are the pros
and cons of SSH? Plus, let's see what is SSH. Ssh stands for Secure Shell. Ssh is a cryptographic
network protocol. Cryptography is a
technique with the help of the sender and the
receiver will be able to communicate securely, that is, without the
intervention of third party. So the third party cannot delete the data or the messages, what is exchanged between
the sender and the receiver. With the help of this SSH, we can establish a tunnel or communication channel
between sender and receiver so that the
messages are not red or decrypted by
anyone during the path. Now the question will arise, why does SSH is used, as I said, are basically used in order to access the remote system or servers with the wide adoption of Cloud servers, nowadays, we basically make use of
SSH heavily in order to establish the connection between our server and the
client machine. Ssh will provide a
mechanism that is for mutual authentication
between the server and the client so
that a tunnel or the channel is established
for communication purpose. No way does SSH is needed. We already have username
and password with the help of V-to-V login
to our Cloud systems. Long way, suddenly there
is a requirement for SSH, username and password
most of the time are highly risky because we might use username and password in order to carry out
a lot of activities. Like me will have a username, password for our
personal e-mail account, and lots of other stuff. Maintaining all
those username and passwords will
require us to audit those things in a file or
some web so that we can remember this mix,
username and password. Risky because someone
who is having access to those plain text files wherever
we store this password, they can try to get
those passwords and login on our behalf and
carry out the operations. Before SSH, there was
symmetrical encryption in which the sender and the receiver use to
authenticate with a single key. That is a key. It could be anything like 1234. So sender will send these key and the receiver will
identify these key. And then they tried to establish
that connection as there is only one key in all
over here, it makes, again, the security risky
because anyone who is having access to that key will try to login on our behalf. Ssh makes use of
asymmetric encryption. That is, instead of one key, like in symmetrical encryption, we're having a couple of keys. That is, a pair of keys that is called as public key
and the private key. So public key, this
key will be generated and stored in the server as well as in the client machines. Like there is a cloud. So there we have the public key attached to the VM or
any other resources. Any communication
happens with the client. It could be a user or the
principal or application, so it could be authenticated
with the private key. Public key is basically used
for encrypting the data, and private key will be used
for decrypting the data. So every user application will have their own private key. With the help of this, they
will decrypt the data, whatever is sent by the server, public key and private key, or used in a
combination to encrypt and decrypt the
message respectively. Now, here is the
comparison between symmetrical encryption and
asymmetrical encryption. In symmetrical encryption, the encryption will happen
with the help of single key, that is, the server. And the client will make use
of the single key in order to authenticate and then establish the
communication channel. But here in the case of
asymmetric encryption, it is making use of keeping that is private
and the public key, we will learn in
our next slide how this SSH key pair
works in real time. This provides
confidentiality, but here in the asymmetrical
encryption, this provides the
confidentiality, authenticity as well as
non-repudiation, please, a few other algorithms
with the help office does symmetrical encryption
key could be generated and those are asymmetrical
encryption methods. These are not the only one. There could be many, and there could be many more
added in future as well. Now, let's see in brief how
these SSH works in real time. So there is the computer
over here client, it could be your
FTP client machine like the FileZilla
or the WinSCP. And that could be a
server like Oracle Cloud, or it could be any other server which will authenticate
based on this SSH. Now first, the public
key will be generated and it will be attached
over here in the server, as well as it could be
shared with the clients. So there are four steps
involved here in order to establish the SSH
communication channel. So in the first step,
the client will share the public key to the
server, the server. It will store this public
key in its own database. Or database could differ. It could be relational
or any other thing, but it will store in some
format in the server, server, it will identify this public key and check whether
that server is having this public key when
it finds that it is intended for
this server only, the public key matches. Then what it does
is it will try to encrypt a message with the
help of this public key, and it will send the
message back to the client. Now, when it sends the
message back to the client, the client will decrypt the message with the
help of private key. This client will be assigned with a private key like this. There will be n
number of clients, which we'll talk
with the server. So this is some data on the client which was designed
with the private key. It will decrypt the message which was encrypted
by the server. After decryption, it will
generate the hash value. In other words, in
some of the cases, this is referred to as
a session key as well. So once the hash is generated, what it does is it will send the message or the value of
the hash back to the server. What this server will
do is the message, what it had sent
in the previous. That is step two, it will make use of that message and it will generate
its own hash. After generating the hash, it will compare the hash
value generated for that particular message
with the hash value sent from the computer
or the client. Once it identifies that both
the hash values are same, then it will authenticate
and it will send back the authentication token
back to this client machine. So as you see, next,
communication is established. That is, the tunnel is established
between the client and the server so that they communicate openly
over this channel. Now this client can make use of server for a number of cases, which we'll learn
in our next side. So after the connection
is established, the client can access the file. Again, this will depend
upon the permissions. Now, let us for simplicity, assume that our client is having access to everything
on that server so it can carry out the
file operations like the FTP file transfer
protocol with the help of, as I said, it can carry
out the CLI things. That is the command line
interface execution of commands. It can remotely login
to any of the VMs. It can do a number of operations in that
particular server. Now the question
will arise how we can generate the SSH keys. So there are SSH client is available across the
operating systems. Here are covered only desktop. There could be many more OS's or the mobile OS's for assistance
clients are available, come into Mac and Linux
operating system. They have built-in
terminal with support SSH. But when it comes
to the Windows OS, we don't have this SSH client
build into command prompt, but we can make use
of *** tea or WSL, that is Windows
Subsystem for Linux. If you're using any
other operating system, then you please check your operating system
layer of the manual. Like what are the SSS
clients available for that particular
operating systems? Now, what are the best practices available for key management? Again, everything is
having pros and cons. This is the cone attached
with the SSH keys in order to overcome
security breach associated with SSH keys. So these are the
best practices which we need to follow
as an organization. We need to have the
visibility or the keys, like whatever keys we generate, we should have proper
visibility like where we store those keys in our server
and to whom we are sharing. It is a good practice that is to rotate the keys periodically, like once in a two
or three months, we change our
public private key. Whenever we change
those things we do to our clients are the applications that we are attaining the keys. We must share those keys after rotation to our clients
so that they can update in their system so that the communication doesn't break in that production environments. Also, we should regularly audit
and enforce the policies, as I told in the step one, where we place those keys in the server and also with
whom we share those keys. Also, we need to
make sure we named the keys properly so
that we will know for what purpose
we have generated those SSH keys in real
or the actual use case, we will have n number of
public-private keys generated. Also, we can control
the access with the help of permissions
only so and so person will be able to access the keys which are stored in the server as well as on
the client side as well. We must always avoid during these keys as a plain text
file on our client machine, we should always make sure
our client machine is not accessible to anyone and
we keep our SSH File Save. So we have studied in brief, what is SSH and how
does the SSH works? What are the pros
and cons of SSS? In our next class,
we will learn how we can generate SSH key that is private and public key also will learn the
various methods, how we can generate those keys in Windows operating system as well as on Linux.
3. 3.1 Generate SSH key pair with WSL (Windows Subsystem for Linux) in Windows OS: In class, we are going to learn
how to generate SSH keys, private and public key
with the help of WSL that these windows Subsystem for Linux on our Windows computer. I'm currently making use of Windows 11 operating
system on my desktop. The prerequisite for
this is you need to have a WSL units distro
or here in store. I'm currently making use of urban to destroy for Windows 11. So you can download that
distro from Microsoft Store. This is the distro, what I'm
making use of currently. After installing that is true. If you are facing any issue, just make sure you turn
on WSL in order to turn on the settings to
your Windows settings, just search for it on and off. You will see this
option that is turned Windows features on or
off people on this. If you are unable
to see that option, just be how to search
for the Windows feature. Then from that, you
can navigate to turn Windows features on or off. So here if you scroll down, there is something called as
Windows Subsystem for Linux, just make sure this is
checked and click on. Okay. Now let's proceed with our
class to create SSH keys. Here is the documentation by Oracle on how to
create the SSH keys. We can create the key with
the help of SSH command from our Linux terminal
directly for each and every argument which
we are going to make use of in this kitchen, Oracle has documented
what is transform. We will learn one-by-one. We can do in a stretch
everything out. We can just add only
SSH key then in our terminal and we can run the commands in
bits and pieces. So we're going to do the same. That is, we are going to run that amount in bits and pieces. We're not going to do the
entire command at once. So it's your choice,
whatever you want to follow the approach. Now let me open the terminal, the command SSH
hyphen Qi Jin space. Now let's see what
is the command? It is minus t. That is the type which
we are going to generate this key or the algorithm we are going to make
use of Odyssey. In our previous
class, we had seen what are the various standards? Are the algorithms
available in order to generate this SSH keys? Here in detail, it
is mentioned that I'm going to make use
of RSA algorithm. If you want to use
any other type, we can make use of that as well. If you want to enter the
vast phase, we can do that. One more thing. What
we are going to add is our key is or how many bits. For security purpose,
you can increase the number of bits so that you
can make the key stronger. So the minimum is 2048. We will make 4096. Let me open the
terminal minus b. Within the brackets
we are to read 4096 and click on Enter. Now it is asking for where
we have to store the side. By default, the path
will be under form. This will be your virtual
machine or the username SSH. And then the ID
underscore, as I say, if you want to chain this part, we can do that as well. Now, let's see whether
we already have this data set in our
home learning folder. We are going to make use of Windows Explorer in order
to check the files. Also, we can use
the CLI as well. On this terminal,
we can navigate to that particular directory
and use the ls command. But as we are running this WSL, we have the advantage of making
use of Windows Explorer. I will show you how
we can make use of Windows Explorer and check the directories of Linux distro. If you open the windows
Explorer on the left side, you will find distros which are available on your
Windows computer. Currently I'm having
only in Linux that is open to 22 dot 0 for, if you are having n number
of Linux distros in, it will list over here based on the version and destroy name. As we're going to store this public and private
key in dot SSH. We will navigate to
the same folder, go to whom were to learning. As we don't have dot SSH, we're going to keep it as is, and click on Enter if you want to change, we can
change as well. It is asking for the passphrase. This is required in order
to protect the private key. We can make the security
is stronger so that whoever is having the
access for the private key, they should know the
passphrase as well. So this will increase
the security layer. As of now I just clicking
on Enter because I don't want to enter any
passwords if you want to do, you can do it all here. It is asking again, just
I'm getting on Enter. So it has generated
the SSH keys. Now let's verify whether it has generated the
keys in the folder. Let us go to this
Windows Explorer. Click on refresh. It escalated dot SSH
folder over here. Enter this. We are having two
folders over here. One is the private
key and public key. So that block B key will
have the extension. Let's see what is
the extension it has created all the properties. It is having dark BOB extension
that is public buy-in. For the private it is, it will not have any extension. It will straight away how
the name that is idea. And as for RSA, whatever we have mentioned while
creating the SSH key, that is not SSS
ID underscore RC. Now we can place
this public key in our servers so that we
can SSH into there. Apparently, if you want
to have any key commands that is in order to
uniquely identify key, then you can make
use of this command as well as we have entered t, that is type and the
build information, we can add the comment
as well, creating that. We have not added
that. But if you want, you can add, because
in real life scenario, we will work with a number of SSH keys so that it
will make their life easy for the person who is handling or managing those keys.
4. 3.2 Generate SSH key pair with PUTTYgen application in Windows OS: In this class, we
are going to learn how to generate SSH key pairs, that is private
and public key on a Windows computer with the help of deejaying
application. I'll open that to teach
in application audio. In order to open
the application, you are to just search for
P on your Windows computer. You will have this application
already installed. I'm currently making use of
Windows 11 operating system. If you don't find
this application, then you can download this
from the public website. So in my case, this application
is already available. So when you launch
this application, you will see such
kind of screen. So first thing is we need to select the parameters over here. I'm keeping the
default that is RSA. In our previous class,
we had seen how we can generate SSH key pairs
from our Linux terminal. We had made use of WSL
on our Windows computer. Same will be applicable for
Linux machines as well. If you're not
watched that video, please check out the video. First thing is we need to select the algorithm, selected RSA. We can select any other
algorithm as well. And next thing is
number of bits. I will make this S 4096. Default will be 2048. As you increase the
number of bits, it will increase the security as more number of
bits will be earlier. But in order to encode
and create the keys, once you populate those details, we need to become this
Generate button over here. Once you click on Generate,
it will take some time. So we'll pause this
video for a couple of seconds and we'll resume once or
PuTTYgen application genders the files for us. We'll put D as gender
did the keys for us. If you see over
here, it has having the fingerprint,
the key command. If you want the gender command, we can change this as well as we had seen in
our previous class. These comments are used to
identify the key uniquely. So if you want, we can
change and getting this default next to it is
asking for the key phrase. This key phrase is used
for private key security. In order to enhance the
security of the private key, we can add the passphrase also, we can confirm once we have populate the
pathways as well. I'm not populating any
passphrase over here. Suppose, if we
want to connect to any specific Cloud services, like AWS or Oracle's
Cloud services. Particular resource on that particular platform
might require you to have the passphrase for
the private key at that time, you have to populate this
for this demonstration, we are not considering
this use case. In order to sell the private
key and the public lives, we need to click on
this self private key. First, we are going to
save them private key. And clicking on, as I will be storing this fine
in downloads folder. As you see, the extension
is P, P K format. This dot py PKA is exclusively for put
t private key files. This will be used only
for connecting from here, I'm naming this as a primate. If you want, you can name
this with document as well. Whatever we have
the commenter here, we can add it on here. So it's always a
best practice to save the file with the
command click on Save. We can say that public key. I will name this as bubbly. The concept. Suppose if you want to seal the primary key in
OpenSSH formats, if your requirement
is to generate the private key in
OpenSSH format, then first thing is we can
copy this entire text, whatever is visible over here, and paste it into notepad. Just select All and click on Copy and Paste in
an odd pregnancy. So it will save in
the open SSH format. This is the public key. In order to generate this private key, go-to conversations and click
on Export open SSH key. Here it will run for, are you sure you are not
populate the passphrase began as c in the open SSH format. Let me name this as private E, open SSS, click on Save. This will save the file
in OpenSSH format. In this class, we
had seen how we can generate the SSH keys, that is private and public
key with the help of PuTTYgen application from
our Windows machine.
5. 3.4 Generate SSH key pair with Command Prompt in Windows OS: In this class, we
are going to learn how to generate SSH key bits, that is public key and
a private key with the help of command prompt
on a Windows computer. In our previous classes, we had seen how we can generate SSH keys with the help
of Linux terminal. We had made use of
Ubuntu distro on our WSL on Windows computer in order to demonstrate
the use case. Also, we had seen how we can generate SSH keys
with the help of an application
which comes out of the block with Windows
operating system. If you're not one
of those classes, please check out those classes before proceeding
with this class. In order to generate the SSH keys with the
help of command prompt, first thing we need to
make sure it's open. Ssh client is enabled. We need to go to settings. So let me click on
the Settings app. From the settings we need to
click on these applications. So the navigation might
vary in our case, for this, we need to click
on this optional features. Just scroll down
and check whether open SSH client is
available on your computer. If you are not installed
this OpenSSH claim, then you can install
this feature as well. So let me close
this application. Next thing is we need
to go to search, search for CMV, that
is Command Prompt. Right-click on this and click
on Run as administrator. If you get a prompt, click on S. Now we need to run
the command like what we had seen in
our previous classes. That is, with the
help of this command, I'm making use of
Oracle's documentation on how to generate SSH. Here, I'm writing the
command that as I said, minus key gen space. We need to select the type of algorithm with which we are
going to generate the key. And I'm making use of RSA. There are lots of algorithms
available to gender. The SSH keys, RSS
is the default one, and then c is the
number of bits. I'm increasing the
security of the key by increasing the
width size to 4096. Default is 2048. If you run only SSH
hyphen antigen, it will consider RSA as
the type 102048 bit size. Apparently, if you want
to add any comments in order to uniquely
identify your key, you can add as well. I'm clicking on Enter. So it is in generating your public and
private key pair list, it will tell the
location where it will install the SSH heat. In my case, it will be users and the username dot SSH folder, it will create an ID underscore. Rsa will be our primary key. Also, it was going to
create one more key that is ID underscore RSA public
key with the.edu extension. I'm keeping this default as I don't want to change
the directory. If you wanted to change again, the part over here,
click on Enter. So it is asking for
the past phase, and this is used for encrypting private key with the password. This will enhance the
security of the private key. Suppose if your computer
is accessed by lots of people and they come
across your private key, then they must know
the passphrase as well in order to SSH
into any x hours, I'm keeping this empty
and clicking on inter, if you want to
populate a needle than just provide the password
and click on Enter, you will get another pump saying enter the
same password again, if you're entered the past
phase in reverse step, you need to provide
the same over here, and you need to remember
this passphrase until you don't
change your keys. Click on Enter. It has generated
the keys for us. Let us know verify
installed in users, the name and the dot SSH. Let's navigate to that folder. Doesn't know user's username. We have to search for the
folder it has created today. I'm recording this class
on 30th of August, ready to only do click on this. This has created two files. One is the private key. It is not having any extension,
and you see the type. And the next one is the
ID underscore Odyssey. This is the public
key which will have.edu extension elastic
in the properties. Sorry it is not PUB extension
for public key like this, we can generate the SSH key
pair that is private and the public key in OpenSSH format with the
help of command prompt. This will make their life easy so that we don't
have to install the Windows Subsystem for Linux and Linux distros on
a Windows computer. Also, we don't want to have the mutagen
application in store, so we can clear the SSH keys right from the command prompt.
6. 3.5 Generate SSH key pair with Linux terminal (Ubuntu) / Same for Mac OS as well: In this class, we
are going to learn how to generate SSH
keys that these private and public
key with the help of Ubuntu or any other
Linux distros. For this demonstration,
I'm making use of Ubuntu, which is installed on
my Oracle VirtualBox. If you haven't installed
any Linux operating system as a standalone operating
system on your computer, then that also
will work similar, like what I'm showing over here. What's gel box? In order to generate SSH key, we have to get
into the terminal. Just right-click on
this home screen and click on this open interval. Let me increase the
size of this window. Now we need to follow
the same steps like what we used to do in
our earlier classes. That is, we have to
write this command. In this case, we're going to define this odyssey, that is, the algorithm which
we are going to make use of in order to
generate the necessity. And so we aren't mentioned how many bits we need in
order to create this. Keith. If you just essence it's hidden, it will consider by
default algorithm as RMSE and the number
of bits is 2048. We can add this. It will ask in the consequences
if we just use SSH keys. And so let me go
to the terminal. Here. Let me SSH hyphen key
then, and click on Enter. Asking entered the final image, you want to save the key. Here it is saying home
slash learning dot id and c. Now let's verify
if there is already dot SSH folder
affiliated or not. Let me go to the files. So I'm here in the
womb, but as of now, we don't have any note SSH file is created
on the folders. Let me go back to the
dominant because you want to check with
the help of CLI, you can do by going to
that folder manually with the help of cd command and then ls in order to
check that did increase. As of now, I don't want within the directory in which
it has to save the t, I'm taking one enter. It will ask to enter
the past phase. As we had seen, this
passphrase is used for private key so that it will increase the
security of the key. Suppose if anyone is having access to those private
key whenever you store, they must know passwords as in, in order to SSH
into the servers. So this is to increase
the security purpose. As of now, I'm
leaving this empty, taking one and again it will
ask, enter the password. Again. Suppose if you're entered the
passwords in previous step, we need to use the same over here and then
click on enter. In my case, I have not entered anything in
the previous step, I'm teaching on entering in. As you can see, the
files are being clear and nothing happened. Now let's go back to
our directly and j. Now we could see that dot
SSH folder has been created. If you open, we are having BOB, that is the public key and ID
underscore RSA private key. Then we can push this
to the server and we can SSH into that server
with the help of those keys. This class, we learn how we
can SSH into any server, in which case we
are going to make use of this toolbox, as I said, one from Windows command prompt, we are going to SSH into this. So that is what your box.
7. 4 SSH authenticate / create secure communication channel between client and server: In this class, we are
going to learn how we can SSH into any server
from our client system. For demonstration purpose, I'm considering my Linux computer, which is set up in the
VirtualBox in my computer, and a server and the WSL client, which we had installed
in our previous class. That's my client which
will SSH into the server. This clean, whatever you see, this icon that is 22 for
this is that WSL Klein. And whatever you see with the terminal disease in
the virtual box. This will be our server and
this will be our claim. Let me maximize this in order
to avoid any ambiguity. First of all, we need to install SSB over here in that arena. Here is the steps which are
required in order to set up the SSH server in our
VirtualBox or Ubuntu system. Before installing any software, we need to just prevent
the sudo apt update. So let's run this here. Just copy and paste. I'm going to provide
all the commands in the block associated
with this class. Please take on that
blog in order to get the set of all the commands, whichever I'm going to
make use of in this class. This has imported
all the packages. Now let's take what
is the next command, sudo apt upgrade if you want, you can do, I'm running
the latest version off. We're going to write
not in my computer. Next statement is we need to
install the essence is B, that is OpenSSL server. Let me copy this command
from here so that it can import all the packages
for this OpenSSL server. To my dominant. Let me clear this window, right-click and paste and enter. It will prompt you to get your input that needs
to continue or not. And getting light
and clicking on Enter so that it can
import the packages necessary for OpenSSL
installed all the packages. Now let's check what
is the next step. We can verify whether
when necessary, so what is happening or
not. Let me copy this. Paste it down here,
click on Enter. So we aren't getting it started. Openbsd Secure Shell knowledge check What is the next step? So this is optional
if it is not running, we can just enable and
we can start the SSH. Now we need to open the port 22, that is the TCP port, so that we can SSH
into this server. I'm going to run this command
in order to allow the SSH, it will open the port 22. Got updated. Next is we
need to enable u fw, copy this and paste
it over here. Click on enter,
active and startup. Now let's take the status with this command here
and click on Enter, saying it is accepting or the port is open
for TCP port 22. Now we can SSH into this server. We are going to make use
of WSL client from this, which is on our host computer,
that is Windows ten. Before starting, we
have to make sure we have the public key
installed on here. This is the shared folder with the help of which I am going to share the files
between the server and the host computer,
that is Windows. So this might differ
in your case. If you want to SSH
into the server, you have to make use of
that SDP copy command in order to push the file from
your client to the server, server to the
client, vice versa. So in my case,
what I've done is, I hope not SSH file from here, and I'll pop it into my client. In my case, my client is the host computer
that is Windows because my server is running in our toolbox
within the same day. So we can access this WSL files from within the File Explorer. In event then you can access
WSL file on the Network tab. But if you're using Windows ten, then you can derive this
w as a dollar symbol. It will open the File Explorer
for your Ws and client. In order to SSH into this Virtual Box server
which we have created, we need to get the IP address. Let me check the IP
address for this, it is 192 dot one dot one
dot six. Let me copy this. This is essential when
we SSH into any server. Now let us switch over to our lovely circling,
which is over here. And here let me write the
command. This is the username. Loved me, I did it. Thank you. Gone into this
asking for the password. So we need to enter the password or phone VirtualBox machine, the term giving a talk here. Now if you see it is logged
into a virtual machine. Now let's see what an all
folders are available with the ls command so that we are
having the extra documents, music, pictures, and all. Now let's create one folder
over here on the side. Let me go to the home. Let me go to new file or
the folder over here. This is me testing him, Liam. Go back to our WSL. So here let me get
into this pitchers. Let me give this
Ls infancy again, having the folder which
we created in our server. Like this. We can SSH into the server from
the client machine. Now, let's see how we
can avoid that password. Like when we SSH
into the server, it has prompted us to enter the password as we are
using private key, which you don't get the
prompt to enter the password. So let's see how
we can avoid that. In order to do that first, we need to provide the
access to the private key. So we can run this command from the terminal of your
client that is over here, which will provide the access to those two files
on your computer. So next step is we need to copy this SSH copy ID that is in
order to configure a server, that is to use the private key whenever SSH into
this IP address. Now, go to this client and click on Enter. And
I've already done this. So you'd have added the
key first term menu. Try to do this, you will get a prompt to
enter the password. Just enter the password and that it didn't ask because I'm running this
command for the second time. But in your case,
for the first time, it will ask the password
of your server. That is, in our case,
it is the virtual box. So we need to enter that
all here, triggered upon. Now next step is we need to use the SSH command that needs
to get into this server. For that we use the
normal command, but this time we should get the prompt to enter
the password. Pick on it. As you can see, we
have logged into the server with this
command directly. We didn't get the prompt
to enter the password. If I try to check the folders within the
server that we'll see these Ls until we get to
pictures and check the folders. What we had created that is
dummy text via like this, we can SSH into the
server with the help of password as well as with
the help of private key, in which case we can bypass
the password authentication. This is how the mechanism works. I'm provides the channel or the communication
channel so that the client and the server can communicate securely
over the internet.
8. Congratulations: You would like to
congratulate you on completing this
course successfully. And we would like to thank you for enrolling
to this course. We hope you have
learned something new with this course and you are now comfortable in
understanding the concepts of SSH. How we can gender
the SSH key pair, how we can SSH into any
server from the client. This was just the basic, that is tip of the iceberg. So there is a lot of concepts
involved in the SSH. This is just a
beginner's guide so that you'll get comfortable
working with, as I said, at the beginning stage
of your project, we would like to get
feedback from you. Please let us know how we can improve the content
of this course. If you want to have
any suggestion on our teaching style or the
course content creation stuff, please do share your feedback
so that we can work on those feedbacks and bring quality contents to
you in the future. We would like to thank you once again and wish you
Happy learning all the very best in
your professional career for any organs. And you may write us to be num dot abs at the
rate gmail.com.
BEENUM LEARNING, Simplifying Imaginations
