How to Set Up SSH Password-Less Automatic Login Using Keygen Password

In today's digital world, managing multiple Linux remote servers can be a daunting task, especially when it comes to automating tasks such as automatic backups, file synchronization, and remote command execution. One of the most effective ways to achieve this is by setting up SSH password-less automatic login using keygen password. This method eliminates the need for manual login credentials, providing a seamless and secure experience.

In this article, we will demonstrate how to set up password-less login on RHEL-based Linux distributions such as CentOS, Fedora, Rocky Linux & AlmaLinux, and Debian-based distributions such as Ubuntu & Mint, using ssh keys to connect to remote Linux servers without entering a password.

To begin with, let's assume that our setup environment consists of two servers: 192.168.0.12 (Fedora 34) acting as the SSH client, and 192.168.0.11 as the target server, where we will login as user sheena.

The first step is to generate a public-private key pair on the SSH client using the `ssh-keygen` command. This command generates a pair of cryptographic keys, one private and one public. The private key is stored locally on your system, while the public key is copied to the target server.

Next, we need to copy the public key to the authorized_keys file on the target server. We can do this using the `scp` command or by manually copying the file using a secure copy protocol.

Once the public key is in place, we can test our password-less login by running the `ssh` command from the SSH client to the target server without entering any password. This will establish an encrypted connection between the two servers, allowing us to execute commands and transfer files securely.

Using password-less login with SSH keys provides numerous benefits, including increased trust between Linux servers, making it easier for file synchronization or transfer, and enhanced security by eliminating the risk of unauthorized access.

In conclusion, setting up SSH password-less automatic login using keygen password is a straightforward process that can be achieved on RHEL-based and Debian-based Linux distributions. This method provides a secure and efficient way to automate tasks, eliminate manual login credentials, and increase trust between Linux servers.

By following these simple steps, you can set up password-less login on your Linux servers and take advantage of the numerous benefits it offers.

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