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: ssh-copy-id email. To create a key pair using a third-party tool. Generate a key pair with a third-party tool of your choice. Save the public key to a local file. For example, /.ssh/my-key-pair.pub (Linux) or C: keys my-key-pair.pub (Windows). The file name extension for this file is not important.

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.

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: Windows 7 professional product key generator online free.

Generate Public Private Key Pair Ubuntu

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

Ubuntu Generate Public Private Key Pair

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:

AGE OF EMPIRES 3 CD KEY. Unknown 12:33:00 am Nerd Activation. Nerd Programmer is website for all newbie programmers who want to learn C,C and JAVA programming language. (in hd)totally free as cracks,patch and activation code will be provided along with them which will be 100% working and totally virus free. Our main aim is to provide. Aug 27, 2017  Age of Empires 3 Serial Key Download Code Crack key generator Full Game Torrent skidrow Origin Key and Steam Online Code Avaiable. Age of Empires 3 Serial Key Cd Key Free Download Crack Full Game Age of Empires 3 Serial Cd Key Generator License Activator Product Origin Keys Full Game Download Free. Age of empires 3 key code generator software. Serial key AGE OF EMPIRES III: PTMGF-28VKB-2W934-482QH-98623 Serial key AGE OF EMPIRES III the WARCHIEFS: KJG93-HDPGB-PXBPP-TFB49-9DBVB Serial key AGE OF EMPIRES III the ASIAN DYNASTIES: QRR4P-F4FDP-H986R-RF6P3-7QK3R. Age Of Empires 3 Product Key If you are searching for the Product Key For Age Of Empires 3 you are at right place. Here we give complete information on that topic. If you are an Age Of Empires fan and want to play full version free of cost you can get the cd key here.Follow this.

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

Key

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

Step 5 – Log in to the Server using SSH Keys

Generate Public Private Key Pair Ubuntu Server

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.

Generate Rsa Public Private 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:

How To Generate Private Key

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

Conclusion

Create Public Private Key Pair Ubuntu

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.