In this tutorial, we will show you how to install SSH Server on Ubuntu 20.04 LTS. For those of you who didn’t know, OpenSSH (OpenBSD Secure Shell) is a connectivity tool that enables remote login via the SSH protocol, hence eliminating eavesdropping, connection hijacking, and other attacks. It helps to secure all network communications by encrypting all network traffic over multiple authentication methods through a secured tunnel.
This article assumes you have at least basic knowledge of Linux, know how to use the shell, and most importantly, you host your site on your own VPS. The installation is quite simple and assumes you are running in the root account, if not you may need to add ‘
sudo‘ to the commands to get root privileges. I will show you through the step by step installation of SSH Server on Ubuntu 20.04 (Focal Fossa). You can follow the same instructions for Ubuntu 18.04, 16.04, and any other Debian based distribution like Linux Mint.
Install SSH Server on Ubuntu 20.04 LTS Focal Fossa
Step 1. First, make sure that all your system packages are up-to-date by running these following
apt commands in the terminal.
sudo apt update sudo apt upgrade
Step 2. Installing SSH Server on Ubuntu 20.04.
Run the following command to install the SSH server on Ubuntu system:
sudo apt install openssh-server
After the SSH server package installation the SSH server daemon should be up and running. To check the status of your SSH server execute the following command:
systemctl status sshd
Step 3. Configure Firewall.
Open ssh port 22 for an incoming traffic on your firewall:
sudo ufw allow ssh
If you are not sure if you are actively using the UFW firewall, you can run the “
ufw status” command:
sudo ufw status
Step 4. Configuration SSH Server.
Now sometimes we may want to change some settings (for example, the port, and root login permission). This can be done by editing the configuration file via command:
The first thing you may want to do is to change the default SSH listening port. Open the file and locate the line that specifies the listening port:
Change it to something else. For example, to 4646:
Save the file and close it. Then restart the service for the changes to take effect:
sudo systemctl restart sshd
Step 5. Connecting to your SSH server.
In order to connect to your SSH server, you are going to use the ssh command with the following syntax:
ssh -p (port) (username)@(ip_address>)
For example, in order to connect to my own instance located at
127.0.0.1, I would run the following command:
ssh -p 2222 (user)@127.0.0.1
Congratulations! You have successfully installed OpenSSH. Thanks for using this tutorial for installing SSH Server on your Ubuntu 20.04 LTS Focal Fossa. For additional help or useful information, we recommend you to check the official OpenSSH website.