Install SSH Server on Ubuntu 20.04 LTS

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Today, in this article, we show how to Install SSH Server on Ubuntu 20.04 LTS. Using the SSH protocol, OpenSSH, which stands for OpenBSD Secure Shell, is a program used to secure remote connectivity between the host and its client. It is concerned about connection hijacking and attacks as it employs SSH protocol for network communication and also encrypts network traffic communication employing various authentication techniques.

The SSH protocol is considered extremely secure when used with conventional security measures. However, keeping SSH connections secure depends largely on human factors. On SSH servers, brute force attacks are a typical occurrence. Attackers use popular identities and passwords to attempt connections to various SSH servers. They employ privilege escalation to reach the root account after gaining access to a system.

It is advisable to use SSH keys instead of passwords for authentication. Organizations whose vital information depends on maintaining the confidentiality of keys, however, continue to face a great danger from improper management of SSH keys. A network protocol called Secure Shell (SSH) is used to establish a secure connection between a client and a server. Every communication between a client and a server is encrypted. We have mentioned below the steps to install SSH Server on Ubuntu 20.04 LTS.

Steps to Install SSH Server on Ubuntu 20.04 LTS

Step 1: Open up your terminal and update the system APT cache repository

first fire up the terminal on your ubuntu system using the hotkeys (CTRL+ALT+T) and type the below command to update the system APT cache repository.

$ sudo apt update

the of the system APT cache repository is successfully updated.

Step 2: Install OpenSSH Server

Right after updating your system’s APT package repository, install the OpenSSH server on your Ubuntu machine by typing the command given below.

$ sudo apt install openssh-server openssh-client

Model “s” and press “Enter” to grant permission to take up additional disk space for the OpenSSH server installation.

After some time, the OpenSSH server installation process will complete and the SSH server will start automatically.

Step 3: Check if the SSH service is running

To check the status of SSH servertype the command below.

$ sudo systemctl status ssh

If you got the output that the SSH service status is up, you should be perfectly ready to Go straight on.

Model “q” to go back and configure the firewall.

Step 4: configure the firewall

Now you need to configure Ubuntu firewall using the UFW tool provided by Ubuntu itself. To enable firewall from any remote machine to access this Ubuntu machine, you need to open an SSH port. The command to configure and allow remote access is typed below.

$ sudo ufw allow ssh

After allowing SSH, it’s time to enable the firewall as well. To check if it is enabled or notthe command to check the status of UFW is given below

$ sudo ufw status

If it is inactive and the case is the same for you, you will need to to allow typing the command

$ sudo ufw enable

After enabling the UFWcheck status again

$ sudo ufw status

Final Words

We hope you like our article on how to Install SSH server on Ubuntu 20.04 LTS. A network communication protocol called SSH, or Secure Shell, allows two computers to communicate and share information. SSH is suitable for use on insecure networks due to a feature which encrypts the communication between the two computers.