How To Configure SSH Key-Based Authentication on a Linux Server

How To Configure SSH Key-Based Authentication on a Linux Server

How To Configure SSH Key-Based Authentication on a Linux Server

Secure Shell (SSH) is a popular protocol used for remote login and command execution on a Linux server. In order to improve security, it is recommended to use key-based authentication instead of password-based authentication. This tutorial will guide you through the steps of setting up SSH key-based authentication on a Linux server.

Step 1: Generate SSH Key Pair

First, you need to generate an SSH key pair on your local machine. This can be done by running the following command in a terminal:

ssh-keygen -t rsa

This will generate a public key and a private key. The private key should be kept secret and stored securely on your local machine. The public key can be shared with the Linux server.

Step 2: Copy Public Key to Linux Server

Next, you need to copy the public key to the Linux server. This can be done using the following command:

ssh-copy-id username@server_ip_address

Replace username with your Linux server username and server_ip_address with the IP address of your Linux server. You will be prompted for your Linux server password.

Step 3: Test SSH Key-Based Authentication

Once the public key has been copied to the Linux server, you can test SSH key-based authentication by running the following command:

ssh username@server_ip_address

If everything is configured correctly, you should be able to log in to the Linux server without entering a password.

Conclusion

By using key-based authentication instead of password-based authentication, you can improve the security of your Linux server. This tutorial has shown you how to generate an SSH key pair, copy the public key to the Linux server, and test SSH key-based authentication.

Keywords: SSH, key-based authentication, Linux, server, generate, public key, private key, copy, test, security.

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