Laboratory Session No. 01

You need to read these instructions very carefully, and apply in laboratory session.

Information you needed

For laboratory session, you will work on a remote GNU/Linux server. You must know the server’s name, your user ID, password and the port number, which allow you to connect the server. This needed information is tabulated below:

Item	Value
GNU/Linux Server	code.gndec.ac.in or code.gdy.club
User ID	YourRollNumber
Password	If you don’t know, contact office of Applied Science Dept.
Port	22

How to access remote server

Use mosh software. In laboratories, teacher will tell you the instruction how to connect to remote server. Software will be already installed in computers avaliable for your laboratory work.

If you wish to connect from your mobile, or desktop, then Visit mosh’s Download page. Follow instructions to get the software and to install it. You may also install it as Chrome browser’s extension. Visit Chrome Store for further information.

From Linux Desktop / Laptop, open “Command line Terminal” (also called console), using Ctrl+Atl+t (may vary depending on Linux Distribution and due to customisation). Using GUI, you may also launch it.

Further help may be taken from: WikiHow

Once you have opened terminal, which is usually a big black rectangular area, in which there is a small solid rectangle (of the size of a single character), after some text like hs@rai:~$ , where hs is user on local computer named rai, like:

hs@rai:~$

At the position of cursor (Solid Rectangle), you may type from keyboard. Type following command.

hs@rai:~$ mosh hsrai@code.gdy.club

hs@rai:~ will be there already, and you need to type only:

mosh <UserID>@<ServerName>

If you UserID is 19123015, and knowing that we will be working on server code.gdy.club, then you need to type:

mosh 1923015@code.gdy.club

First time, if anyone try to connect to a new remote server, then he will be presented with following text:

The authenticity of host 'code.gdy.club (<no hostip for proxy command>)' can't be established.
ECDSA key fingerprint is SHA256:nnqmn/lV3O3BUIYUQq2kfN8auq9+d6oq1acUVc5kFWc.
Are you sure you want to continue connecting (yes/no)?

Now you are supposed to read it very carefully, if you type y or n, then you will be surprised (I say, rather SHOCKED) by getting messages like:

Are you sure you want to continue connecting (yes/no)? n
Please type 'yes' or 'no': y
Please type 'yes' or 'no': yes

So you need to type three letters (characters) as instructed by the computer, which are y e s. Single character will not work.

After this, once connection established (make sure Internet is working, and there is not typing error/mistake), remote server will request you for password:

hsrai@code.gdy.club's password:<Enter your password, and press Enter: You won't se anything as you type> 
Creating directory '/home/hsrai'.
Linux computer-centre 4.19.0-5-amd64 #1 SMP Debian 4.19.37-5+deb10u1 (2019-07-19) x86_64

Welcome to Coding Server maintained by Computer Centre of GNDEC, Ludhiana,
Specifically for the students of 1st year for their course:
                       =================================

                        Programming for Problem Solving

                       =================================
To know how to work, read:

 https://github.com/gne-ldh/PPS/blob/master/Content/Notes/README.md


hsrai@computer-centre:~$ ls
public_html

It will display something about itself, and may include some welcome message. The above message is the sample, The message, you get may be different.

Now you have entered in to a remote server. That may be a computer on network, physically placed on the same table, or may in Canada, Europe, or USA. That may be an old machine or may be a super computer.

If you are able to do this, then pat yourself. You have reached first destination. But interesting journey yet to come!

Continue reading next instruction, may be after a tea break ;-)

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