Once you have your Ubuntu (20.04 in my case) installation ready in your USB, edit the user-data file. Under the section ## Install additional packages on first boot, Uncomment packages, and add a new entry for the openssh-server package. For example: ## Install additional packages on first boot packages: - openssh-server. If you can connect to the server via SSH successfully you can proceed with the next step, which is securing OpenSSH. Secure OpenSSH on Ubuntu 16.04. One of the recommended ways to secure your server when using OpenSSH is to disable the Root login. First, create a new user SUDO on the Ubuntu server and then edit the OpenSSH server config file.
Ssh-copy-id -i /.ssh/idrsa.pub email protected Now login to the server with SSH, It will not prompt for the password again. Ssh email protected 5. Configure Firewall with FirewallD. The Default Ubuntu 20.04 server edition, do not have firewalld installed on it. Disabling SSH on Ubuntu # To disable the SSH server on your Ubuntu system, simply stop the SSH service by running: sudo systemctl disable -now ssh. Later, to re-enable it, type: sudo systemctl enable -now ssh Conclusion # We’ve shown you how to install and enable SSH on your Ubuntu 20.04. If this works, then your SSH server is listening on the standard SSH port. If you have set your computer to listen on a non-standard port, then you will need to go back and comment out (or delete) a line in your configuration that reads Port 22. Otherwise, your SSH server has been configured correctly. To leave the SSH command-line, type: exit.
SSH, also known as Secure Socket Shell or Secure Shell, is a cryptographic protocol that helps to encrypt communication in unsecured networks where an SSHD is the daemon program for SSH. Together they provide secure communication between two untrusted hosts over an insecure network.
Step 1 : To install it in Ubuntu, use the following command:
Enable Ssh Ubuntu 20.10
Step 2 : You may check its status by running command:
Step 3 : We’re going to edit a /etc/ssh/sshd_config file using the vi editor as the root user, so you should type the following command on the terminal:
Step 4 : Look for a line that contains PermitRootLogin and replace it with the following line:
Step 5 : Save the /etc/ssh/sshd_config file
Step 6 : Now it’s time to restart the SSH server. Then your server will be installed, configured, and ready to use. You can test this by executing the following command:
Ubuntu 20 Enable Ssh Server Windows 10
Step 7 : You can test your SSH server by trying to connect to it and typing on the terminal the following command:
Ubuntu 20.04 Sshd
Step 8 : Now you will see a message asking for your authorization. Type yes and your password. You’re now connected to your our server through the SSH protocol.
Simplifying SSH connections with a config file
Step 1 : A local configuration must be stored in the .ssh directory of your home directory, and be named config. The full path would look something like this:
Step 2 : This file doesn’t exist by default, but if it’s found, SSH will parse it and you’ll be able to benefit from it. Go ahead and open this file in your text editor, such as nano:
Step 3 : This config file allows you to type configuration for servers that you connect to often, which can simplify the SSH command automatically, for example:
Ubuntu Enable Sshd
Step 4 : SSH connections with a config file