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Friends here

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our concept is 'Working with remote Linux Server from Linux

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or Windows as your localhost by using paramiko of Python'.

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See you're having one remote server, and there is a Linux

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server, and you are having a local server and this local

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server maybe windows or maybe Linux. And from here

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I need to work with your remote server by using paramiko

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of Python. Right.

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This is our concept here.

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But before going to work with that, let me give some introduction

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to your Paramiko Module.

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See first of all Paramiko is your Python module or Library,

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which is useful to work with your remote servers. See working

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with your remote servers means sometimes you need to execute

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some commands on your remote server without logging into

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that from your local server, or sometimes you need to transfer a

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file from local server to remote server, or sometimes you

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need to download a file from remote server to local server.

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So all these actions we can perform with the help of Python

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Paramiko Module, but before going to use that you should

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have a SSH or SSH V2 protocol on your local server, or simply

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from where you are running your Python code

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there you should have, on that operating system

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you should have SSH V2 protocol. That's it.

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And guys we know that by default we have SSH protocol on

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your Unix like systems.

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If your local server is Windows you need to check for your

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SSH. If it is not there you have to install it.

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Right. That's fine.

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Then how it is going to work? How your Python Paramiko

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Module is going to work?

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See your Python Paramiko Module is going to create

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a SSH client first with the help of your SSH 2 protocol,

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I mean SSH V2 protocol. And by using that it is going to connect

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with your remote servers and it is going to work.

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Working means executing commands and transferring files.

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That's fine. Now for authentication purpose your paramiko

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is using two ways. One is using 'username' and 'password', and

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second one is using 'username' or your 'keys',

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I mean 'username' and your 'keys'.

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[no audio]

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And guys finally the last point for your introduction is

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we can connect from Linux to Linux, or Linux to Windows, or

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Windows to Linux, or Windows to Windows using your

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Paramiko Module.

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So we have four combinations, right?

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Let me write all combinations here. Suppose local,

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let me write here in this way. "Local server", then your

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"Remote server".

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So local server maybe Windows, and your remote server,

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let me give all the combinations - Windows servers,

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or local server is Windows and remote servers maybe Linux

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servers. Now local server, maybe Linux or Windows Server

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maybe Linux, or it is Linux and Windows,

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remote server is Windows.

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[no audio]

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So these four combination will works with your Paramiko

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Module, and here for time being we are going to work with

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by conserving your local server as Windows or Linux and your

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remote server is only Linux.

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Right. So first I am going to consider

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local server as Linux

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[no audio]

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and remote server also Linux.

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[no audio]

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Second we will work by considering local as Windows and remote

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server is Linux. That's fine.

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Now guys before going to use your paramiko

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the first thing is you should have a SSH on your localhost.

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Let me check. See suppose

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this is my Local server.

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[no audio]

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from my VMware.

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Let me remove this. Fine. Now see here.

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[no audio]

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Yes, I have SSH. Then no problem.

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We have already SSH, then we can work with your Python paramiko.

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And one more thing just check it whether we have paramiko or not.

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So here I have paramiko.

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Anyway, this is not the default module

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so if it is not there on your host, then you need to install.

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See let me show you on my Windows suppose

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see I tried to 'import paramiko'. Here

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there is no name called 'paramiko', I mean "No module named

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paramiko". Then that's why what I did here is

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simply I installed with the help of 'pip', 'pip install paramiko'.

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Same thing you can follow on your Linux system as well to install your

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paramiko. That's fine.

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So after installing I imported, then there is no error. That's fine.

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So if it is not there you have to install your Paramiko

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Module. So I am giving you simply here steps, 'pip install paramiko'

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to install your Paramiko Module. That's fine.

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Then second thing is, how your,

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yeah, now let me start with code to use your paramiko to work

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with your remote servers.

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Let me write a simple code here.

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Sorry, not this, this is my local server.

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Let me exit from here.

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[no audio]

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'working_with_remote_linux', maybe any server, remote, that

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that actually any server, you can work with any remote server.

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Of course, but time being we are going to work with only remote

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server as Linux. And one more thing, let me take

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my 'python' path,

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[no audio]

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see that. The very first thing, you need to

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import Paramiko Module.

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[no audio]

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Right. That's fine.

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So after that your paramiko is going to work with your

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remote servers by creating a client.

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Actually, we need to create that client.

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So to create your client, this is the syntax. So here

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[no audio]

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guys, I will give all these steps on the below of this video,

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then you can go with that and you can practice. So this is

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simply any variable, but this is your client, 'SSHClient'.

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Simply you can assume 'ssh' of your operating system.

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Now I created from paramiko this 'SSHClient'. Be clear

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this is a variable, you can take any name, but I have

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taken suitable name.

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So after that

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let me try to connect with my remote server.

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So to connect with your remote server

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we have a syntax called,

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I mean anyway we have two procedures -One is using 'username'

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and 'password', second one is using 'username' and 'keys'.

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So for time being I am going to use 'username' and 'password'.

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So let me take my remote server 'hostname' first.

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So guys, this is the syntax simply, 'ssh.connect', your remote

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server 'hostname', with what user and what is the password, and

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by default it is going to use port 22 only, you no need to

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mention, but if you want to mention you can mention it. Now

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let me open my remote server.

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[no audio]

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So for this remote server, this is a public IP,

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no, I mean 'hostname'.

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You can also mention in your real-time FQDN name of your server.

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That's fine. 'username' is this one. And I have given already 'password' as

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'paramiko123' I think. Let me check it. 'paramiko123'.

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Let me save it and run this. So before going to run

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let me provide execution permission because we are on Linux.

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[no audio]

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See that, you are getting an error called

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'paramiko.ssh_exception',

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and if you observe here, "not found in known hosts". See whenever

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if you try to connect with any remote server using your SSH at

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very first time, so let me show you that, 'ssh' suppose

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this is my 'hostname',

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see it is going to ask 'yes/no' permission, right?

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So manually you are entering here,

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but in Python script we are not entering that 'yes/no' option.

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If you say 'yes' then only you can connect. If you say 'no' you

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are going to reject.

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Now if you don't want to ask this, right, in your SSH you are

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providing some strict host key checking as 'no'.

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[no audio]

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Right. But in Python how we can avoid that checking this, host key checking,

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right? Simple.

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You need to add a 'AutoAddPolicy' to avoid that.

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I don't want to check 'yes/no' confirmation. By default

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I want to work with that given server.

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So for that you need to add this line before going to connect

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with your remote server. That's it.

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[no audio]

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Right. Now if I run this, now you're not going to get any

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error. Just let me run this and see the result.

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That's it. You're not getting any error means now your script has been

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connected with the, I mean through script you have been connected

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with your remote server, this server.

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So guys the connection, whatever the connection you established

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with your remote server will be there with this 'ssh' object

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only. Now to execute any commands, or to transfer a file, for

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all those things you have to use this SSH.

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Now, let me use this to execute some commands.

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So simply to execute your commands

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you have to write 'ssh.',

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yeah, one more thing. You can write, I mean you can execute

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any command here, 'exec', execute, 'command', but before that

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if you are running some commands on your remote server sometimes

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you may need some input to provide that, I mean to provide

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input for that command, or some, forget about input, sometimes

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you're going to get success output, sometimes you're going

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to get error output while running your command, while executing

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your command on your remote server. That's why here we are

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having, to execute our command this is the syntax. You can

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take any command. Suppose I am running, see guys

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I am using 'ssh' to execute our commands on your remote server.

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[no audio]

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Right. And if you observe here, this command, I mean after

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running this command you may get some success output. If you

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got success that is going to store into this variable.

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If you get an error while running this command that output

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will store into this. If you get output, error is null, empty.

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If you get error, output is null. Then what is the use of this

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'stdin'. See while running your commands on your remote server

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sometimes that command may need input.

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Let's say you are running some 'sudo' command,

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and 'sudo' command

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sometimes may need password, that password we can provide with

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the help of 'stdin'.

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Guys working with 'stdin' we will see in the later

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videos, as of now

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I am going to take only 'stdout' and 'stderr'. Nothing is there.

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I am running my command in this way.

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Then let me run first very simple command. Suppose

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I want to get, 'whoami'?

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First let me give invalid command.

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Right. See actually my intention is I'm trying to find with

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what user we connected.

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We know that we connected with this user only. That output

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actually we are expecting. But this is a invalid command

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that's why you're going to get an error. That error will be

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there in this. And these two 'stdout' and 'stdin', they are like

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file objects.

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So if you know, if you remember how to read a content from

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file object, by using '.read', or '.readlines'. Let me write

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first. "The output is: ", in case if you have a output, and let me print.

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[no audio]

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"The error is: ". Now I am going to print here the success output

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in case if we have that output, 'stdout.read'.

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Then in case if you get an error that we are going to print

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here, 'stderr.read'

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Let me save it.

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And let me run this.

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See the output. What happened? "invalid syntax". 'print(stderr.read()))'

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Yeah, we have given one extra parentheses I think. Now it's fine.

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See, output you are getting an empty but error you

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are getting something because the command whatever we have

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given that is invalid command. That's why it's saying, "command

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not found". That's why we are getting an error. And if you observe

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you're also getting an empty, empty line because this is the

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file content, right. If you read a file content by default

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for each and every line at the end you have a '\n', so

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for this line also you're having at the end '\n', and that's

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why we are getting this. Now you can do something. Not only 'read'

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you can also write, 'readlines' information.

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[no audio]

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But if you remember while working with files, 'readlines' is

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a list of values.

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I mean simply your file content will be converted into number

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of values in your list.

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Each line is one value in your list.

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[no audio]

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That's it. See that '\n' is there.

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[no audio]

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Right. Anyway, that's fine. Based on your requirement

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you can go with 'read' or 'readlines'.

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Now, let me give a valid command.

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Let's say 'whoami'. 'whoami', now this is a valid command, right?

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Now see the result.

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[no audio]

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Easy to user. But output is, I mean error output is empty. Because

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you got success output that’s why error is empty, right?

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Guys forget about input 'stdin', but syntax is you have to

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use 'stdin, stdout, stderr'.

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That's fine. Now, let me run one more command.

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You can run any command.

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Let me comment this.

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[no audio]

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Let me write same syntax.

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[no audio]

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Suppose I am running,

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let's say 'uptime'.

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Save it, and run it, and see the result.

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[no audio]

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That's it.

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Right. So not only that,

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let me execute one more thing like 'free - m'.

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[no audio]

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See the result.

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[no audio]

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That's it.

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[no audio]

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00:15:11,800 --> 00:15:15,200
Right. Yeah, what you are getting here?

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[no audio]

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00:15:20,100 --> 00:15:24,300
Okay, 'stdout.readline', not 'lines', right?

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00:15:24,400 --> 00:15:26,700
So that's why you got a, I mean you're not getting perfect

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output. 'readlines' is going to give all the lines from your

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content. So previously I used only 'readline'.

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Now see that, 'readlines'.

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You're going to get complete output for your 'free -m'.

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That's fine. So guys, this is the simple way to execute your commands

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on your remote server.

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And here we are using 'username' and 'password'. And one more

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thing, our local server is Linux and remote server is also

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Linux. Now, let me execute same thing with the help of 'keys'.

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[no audio]

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First let me comment this,

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working with your 'username' and 'password'.

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So if you want to work with 'keys', very simple.

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[no audio]

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First thing, this is the syntax.

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[no audio]

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Right. Simply your 'hostname', 'username', instead of 'password'

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we are going to use 'key_filename', then port, that is your

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wish, if you want to use you can use it

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otherwise you can also skip that. No problem.

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And one more thing. What

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is this 'key'? From where you can get this 'key'?

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[no audio]

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Right. See that.

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[no audio]

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See, you can create your 'keys' using 'ssh', and you can exchange your 'key'

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then the private key path you have to mention in this file,

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I mean in your code.

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The private 'key_filename' you have to mention here.

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Let me do one thing.

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I'm going to do, '.ssh'.

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[no audio]

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Let me, no files here, right?

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Let me create some keys.

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'ssh-keygen'.

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So I am going to create my SSH key values,

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I mean keys. See that. We have private key and public key.

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First we have to share this key with your suppose your remote server.

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Let me share that with my remote server.

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[no audio]

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What is the remote server IP?

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Let me get it.

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[no audio]

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And be clear, here I am sharing

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[no audio]

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with 'ec2-user'. 'ec2-user'

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I'm sharing my key.

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[no audio]

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Now 'ec2-user'. Sorry

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what is the 'password' we've given for that? 'paramiko123'.

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[no audio]

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That's it.

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Now, what is your private key?

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This is your private key. In this part

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we have your private key.

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[no audio]

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Simply.

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[no audio]

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Right. Now this file we have to use in our code. That's it.

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[no audio]

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So in case by default anyway you are having now password-less

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authentication, you can use it.

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But if you want to use key or just provide your 'key_filename'

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path here completely. If your key is there in the current

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location directly

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you can write your only key name.

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[no audio]

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That's it. Now,

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let me save it and run it. Be clear now

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we are using username and your cryptographic key, SSH private

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key, right. Now,

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Let me run,

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and see the result.

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[no audio]

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What happened?

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[no audio]

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00:19:10,500 --> 00:19:12,200
'Authentication failed'.

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00:19:12,800 --> 00:19:18,100
Oh I'm using 'ansadmin' user. That's not correct.

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[no audio]

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00:19:21,400 --> 00:19:22,400
Yeah.

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00:19:23,500 --> 00:19:25,800
Username is 'ec2-user'. With 'ec2-user'

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we exchanged our key, right. So be clear about user and

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your keys.

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00:19:31,700 --> 00:19:35,410
[no audio]

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00:19:35,400 --> 00:19:38,200
Yeah, now let me run this and see the result.

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00:19:38,200 --> 00:19:40,400
[no audio]

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00:19:40,400 --> 00:19:41,400
That's it.

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00:19:41,800 --> 00:19:45,100
So guys this is the way how we can work with 'username' and 'password',

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00:19:45,100 --> 00:19:47,600
and how we can work with your 'SSH keys'

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using your paramiko, okay.

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I will share this key below this video just go through that.

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And just now we worked with Linux with Linux. Now,

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my requirement is I want to work from my local server, from

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00:20:02,900 --> 00:20:06,000
sorry, my local server as Windows. Let's say this is my

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Windows Server, right?

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00:20:07,000 --> 00:20:10,110
[no audio]

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Now, let me write a new code on my Windows Server, save it.

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[no audio]

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00:20:16,900 --> 00:20:18,800
Some key, some script name as,

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'working_with_remote_Linux_from_windows.py'

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00:20:28,000 --> 00:20:30,600
And before going to work with that, you have to check it.

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Do we have SSH? Yes. On my Windows

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I already installed SSH. If it is there, okay.

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00:20:35,700 --> 00:20:37,700
If it is not there, please install them first.

383
00:20:38,900 --> 00:20:40,300
Right. Then after that

384
00:20:41,600 --> 00:20:44,300
let me take step by step.

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00:20:44,700 --> 00:20:45,900
We know we are already having.

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First we need to install, we need to install 'paramiko',

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00:20:51,000 --> 00:20:54,600
then we have to import that in our code, then we need to add,

388
00:20:55,000 --> 00:20:59,100
we need to create SSH client, then 'AutoAddPolicy'.

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00:21:00,800 --> 00:21:06,100
[no audio]

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00:21:06,100 --> 00:21:09,600
Just now I added 'AutoAddPolicy'. Just to avoid yes or

391
00:21:09,600 --> 00:21:12,800
no confirmation like that, right. Then after that you need

392
00:21:12,800 --> 00:21:14,100
to connect with your server.

393
00:21:14,100 --> 00:21:15,700
So to connect with your server

394
00:21:15,700 --> 00:21:17,910
[no audio]

395
00:21:17,900 --> 00:21:18,900
this the syntax,

396
00:21:18,900 --> 00:21:23,500
[no audio]

397
00:21:23,500 --> 00:21:25,600
'ssh.connect' your 'hostname',

398
00:21:25,600 --> 00:21:26,700
maybe this is 'hostname'.

399
00:21:26,900 --> 00:21:27,900
Let me verify it.

400
00:21:28,300 --> 00:21:32,600
392, yeah, 'hostname'. Then 'username' is as of now

401
00:21:32,600 --> 00:21:39,600
we are having our username as 'ec2-user'. Then we are not

402
00:21:39,600 --> 00:21:41,100
using 'key_filename'.

403
00:21:41,800 --> 00:21:44,200
So what we are using? We are using simply 'password'.

404
00:21:45,300 --> 00:21:49,500
Right. So what is the 'password'? Did we mention here? No.

405
00:21:50,000 --> 00:21:53,400
Yeah, 'password' is 'paramiko123'.

406
00:21:55,000 --> 00:21:59,200
Save it. First let me run this. If it is fine

407
00:21:59,200 --> 00:22:00,400
it won't give any exception.

408
00:22:00,400 --> 00:22:03,810
[no audio]

409
00:22:03,800 --> 00:22:04,900
Yeah, it's fine. That's why

410
00:22:04,900 --> 00:22:07,400
it has been executed without any errors. Now

411
00:22:07,400 --> 00:22:10,600
I want to execute some command, any command you can execute

412
00:22:10,600 --> 00:22:11,600
on your remote server.

413
00:22:12,700 --> 00:22:15,800
So guys now I'm working with from my local server.

414
00:22:15,800 --> 00:22:18,910
[no audio]

415
00:22:18,900 --> 00:22:22,300
Yes. Yeah, let me print the output, then only we can see the output,

416
00:22:22,300 --> 00:22:29,800
right. 'stdout.'. Sorry not 'stderr', 'stdout.read', maybe 'readlines'

417
00:22:30,500 --> 00:22:31,500
That's fine.

418
00:22:31,500 --> 00:22:33,100
[no audio]

419
00:22:33,100 --> 00:22:33,500
That's it.

420
00:22:33,500 --> 00:22:36,310
[no audio]

421
00:22:36,300 --> 00:22:37,500
You're getting your output, right?

422
00:22:38,800 --> 00:22:41,900
That's fine. Now on Windows,

423
00:22:43,100 --> 00:22:45,500
I mean from my local server as Windows

424
00:22:45,500 --> 00:22:48,300
I connected with my remote server Linux, and I executed

425
00:22:48,300 --> 00:22:51,900
some command with the 'username' and 'password', now if you want

426
00:22:51,900 --> 00:22:53,800
to work with some keys,

427
00:22:53,800 --> 00:22:56,800
yes, you can also generate your keys on your local server

428
00:22:56,900 --> 00:22:59,700
the same way how we worked on Linux server.

429
00:23:00,900 --> 00:23:04,400
So in Linux server, I generated some keys and I shared with

430
00:23:04,400 --> 00:23:08,300
my remote server, and I then used this in this way, right. The

431
00:23:08,300 --> 00:23:09,300
same way on Windows

432
00:23:09,300 --> 00:23:12,400
also you can generate your keys and you can work with your

433
00:23:12,400 --> 00:23:16,200
remote server from your local server as Windows. That's it.

434
00:23:16,200 --> 00:23:18,610
[no audio]

435
00:23:18,600 --> 00:23:23,800
Guys, not only this, this is just basic way to execute your

436
00:23:23,800 --> 00:23:26,500
commands on your remote server, but while working with your

437
00:23:26,500 --> 00:23:29,700
remote servers you will get different exceptions and you

438
00:23:29,700 --> 00:23:31,000
need to handle all of them.

439
00:23:31,400 --> 00:23:34,600
So how to handle, we'll discuss in later videos, and how to

440
00:23:34,600 --> 00:23:37,300
transfer files from your local server to Windows servers

441
00:23:37,300 --> 00:23:40,400
all those things we are going to discuss in later videos.

442
00:23:41,400 --> 00:23:42,400
Okay.

443
00:23:42,900 --> 00:23:43,900
Okay.

444
00:23:44,800 --> 00:23:47,000
Yeah, okay guys. Thank you for watching this video.

445
00:23:47,590 --> 00:23:51,690
[no audio]