Generate A Ssh Key Ubuntu

Dec 18, 2019  In this tutorial, we will walk through how to generate SSH keys on Ubuntu 18.04 machines. We will also show you how to set up an SSH key-based authentication and connect to your remote Linux servers without entering a password. Dec 07, 2019 SSH is short for Secure Shell. Secure Shell is a network protocol that provides administrators with a secure way (with encryption) to access a remote computer. It allows an administrator to log into virtual space server with an SSH key instead of a typical password. This eliminates the usual weakness.

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• Generate Ssh Key Ubuntu 18.04
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• Ubuntu Add Ssh Key

SSH stands for “Secure Shell” and is an encrypted protocol used to log in and manage a remote server. SSH also supports various authentication mechanisms. SSH uses password-based authentication and public key-based authentication for a secure connection between a client and a server. SSH key-based authentication is more secure than password-based authentication because keys are very hard to guess or crack using currently available computing power.

Apr 28, 2018  With Bash on Ubuntu on Windows, you can use a Windows Subsystem for Linux on Windows 10. With that, you can run many Linux commands, for example, ssh.This post shows you how to create an SSH key, which should be used on both, the Linux subsystem and Windows. Jul 29, 2019 How to Generate SSH Keys on Ubuntu 18.04 Installing SSH Server. If you are already running an Ubuntu 18.04 server, you can skip this step. Step 1- Generate the SSH Key Pair. On your client system – the one you’re using to connect to. Step 2- Copy Public Key to the Ubuntu Server. Step 3- Log in. Generating these keys from Linux is easy, and thanks to Ubuntu on Windows, you can follow the same process from Windows 10. But even without Ubuntu, SSH keys can also be generated with the free and open source Windows application, PuTTy.

In this tutorial, we will show you how to set up SSH key-based authentication on an Ubuntu 18.04 server.

Prerequisites

• Two fresh Ubuntu 18.04 VPS on the Atlantic.Net Cloud Platform.
• Root passwords configured on both servers.

Step 1 – Create an Atlantic.Net Cloud Server

First, log in to your Atlantic.Net Cloud Server. Create a new server, choosing Ubuntu 18.04 as the operating system with at least 2GB RAM. Connect to your Cloud Server via SSH and log in using the credentials highlighted at the top of the page.

Once you are logged into your Ubuntu 18.04 server, run the following command to update your base system with the latest available packages.

Step 2 – Generate the SSH Key on the Client Machine

First, log in to your client machine and generate a new SSH key pair by running the following command:

You will need to press Enter to accept the default file location and provide a passphrase to add an extra layer of security, as shown below:

The above command will generate a 2048-bit RSA key pair with a secure passphrase to prevent unauthorized users from logging in.

You can see the generated public and private keys with the following command:

You should see the following output:

At this point, you have public and private keys that you can use to authenticate with your Ubuntu server.

Step 3 – Copy the Public Key to the Ubuntu Server

Next, you will need to copy the public key from the client machine to your Ubuntu 18.04 server. You can copy the public key with ssh-copy-id utility as shown below:

You should see the following output:

Type “yes” and press ENTER to continue. You should see the following output:

Next, you will be prompted to enter the remote username and password. After the successful authentication, the content of the public key ~/.ssh/id_rsa.pub will be appended to the remote user ~/.ssh/authorized_keys file as shown below:

Step 4 – Disable SSH Password Authentication

Next, log in to your Ubuntu 18.04 server machine and disable SSH password-based authentication to add an extra layer of security to your server.

You can disable password-based authentication by editing the file /etc/ssh/sshd_config:

Find the following lines and change the value to “no”:

Save and close the file, then restart SSH service to apply the configuration:

Step 5 – Log in to the Server using SSH Keys

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At this point, SSH key-based authentication is configured. Now it’s time to log in to the Ubuntu 18.04 server machine with the public key.

You can login to your Ubuntu 18.04 server by simply running the following command:

If you are logging in for the first time, you will be prompted as shown below:

Type Yes and hit Enter key to continue. Next, you will be prompted to enter the passphrase for your private key as shown below:

Provide your private key passphrase and hit Enter to log in to your server.

Conclusion

In the above tutorial, we learned how to set up an SSH key-based authentication with a passphrase on Ubuntu 18.04. The connection between your client machine and Ubuntu 18.04 server machine is now highly secure. You can also use the same key for another remote server. If you’re ready to get started with SSH key-based authentication, try VPS hosting with Atlantic.Net today.

SSH, the secure shell, is often used to access remote Linux systems. But its authentication mechanism, where a private local key is paired with a public remote key, is used to secure all kinds of online services, from GitHub and Launchpad to Linux running on Microsoft’s Azure cloud.

Generating these keys from Linux is easy, and thanks to Ubuntu on Windows, you can follow the same process from Windows 10. But even without Ubuntu, SSH keys can also be generated with the free and open source Windows application, PuTTy

Generate Ssh Key Ubuntu 18.04

Over the following few steps, we’ll guide you through the process of generating SSH keys using both Ubuntu on Windows and PuTTY.

Requirements

All you need is a PC running Windows 10 and either of the following installed:

Generate Ssh Key Ubuntu

• The puttygen.exe executable from PuTTY

Ubuntu Add Ssh Key

If you don’t already have Ubuntu on Windows, take a look at our Install Ubuntu on Windows 10 tutorial.