What is the best way to enhance security on a Linux server after purchasing a new PAM solution?

Using SSH keys and removing generic passwords is considered the best way to enhance security on a Linux server, particularly after implementing a new Pluggable Authentication Module (PAM) solution. This approach significantly reduces the risk of unauthorized access.

SSH keys provide a more secure method of authentication compared to conventional username/password combinations. They function through a public/private key pair where the private key remains on the user's device, and the public key is placed on the server. By using SSH keys, even if an intruder tries to guess a password, they would not gain access without the corresponding private key, which is typically more complex and much harder to obtain.

Moreover, removing generic passwords helps to eliminate a common vector for attacks. Generic passwords are often weak and can be easily guessed or brute-forced by malicious actors. By enforcing the use of SSH keys and eliminating the reliance on passwords, the server's overall security posture is significantly boosted.

Establishing strong authentication measures is crucial for securing a Linux server, especially in a production environment or any place handling sensitive information. This strategy aligns with best practices in server security and access control.