how to install ssh in ubuntu

SSH is a Secure Shell Protocol that is used to securely log into the remote operating system. It is the most common way to access the remote Linux.

How to install ssh server and client in ubuntu

How to install ssh in ubumtu

What is "SSH"?

SSH is a Secure Shell Protocol that is used to securely log in to the remote operating system.

It is the most common way to access the remote Linux or UNIX like server.

 

Check whether ssh client is installed

verify ssh client is installed

$ ssh

Just give this command to check whether the SSH client is installed. If it gives this kind of response that means SSH client is installed on your system.

Now you will be able to connect to the different remote operating system.

Check ssh server is installed

To verify if ssh server is installed on your system. Just write "ssh localhost" which means you are trying to connect to your localhost.

$ ssh localhost

 

verify ssh server is installed

If it gives this kind of response which says "connection to host localhost port 22: connection refused" that means the OpenSSH server is not installed on your system.

You need to install it to allow other operating systems.

For example, If you are working on your Windows operating system you want to access Ubuntu operating system by your terminal using "SSH" then you need to install OpenSSH.

To install just write "sudo apt install openssh-server".

check openssh server is running

To check whether the OpenSSH server is running. Just give this command "sudo service ssh status" and then press ENTER.

ssh server is running

$sudo service ssh status

If it gives this kind of response which says "active running" that means the OpenSSH server is running on your system.

Just give this command "ssh localhost".

This time it allows you to connect to your own operating system wire terminal.

Just say "yes" and then give your ubuntu password you are logged into your own operating system which is your ubuntu operating system.

 

Changing default port in ssh

If you want to change the default port on which ssh works, then you need to just change this port into a special file.

Just write this command,

$ sudo gedit /etc/ssh/sshd_config

 

sshd_config file

Which is going to open this kind of file. This is the configuration file of this "ssh server".

So if you want to change the port just search for the "port" and you can see the default port is 22.

You can change it if you want to run this "openssh server" on some different ports.

Conclusion

In this way, you can log in to your Ubuntu operating system from a different Linux or UNIX or even Windows operating system using SSH client or SSH command.

HAVE A NICE DAY💙

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