Linux interview question: How do you configure passwordless SSH access?

@uday_devops SSH key login, proper permissions, test end to end

@uday_devops ssh-keygen, ssh-copy-id, done. this is a 30 second task being turned into an interview question. if this is what they're asking you the bar is on the floor

@uday_devops Generate SSH keys → copy public key to server → set permissions → disable password login.

@uday_devops Generate ssh key by using ssh-keygen copy public ip and paste necessary location and try to connect. Mostly we can use 2 host systems that need to connect with each other.

@uday_devops Generate an ssh key with ssh keygen then copy the public key to authorized_keys via ssh copy id after that set correct permissions and you get clean passwordless login feels like magic first time ... You need to configure the SSH config as well

@uday_devops First, modify sshd_config and disable password-based authentication by setting PasswordAuthentication no.

@uday_devops People say it’s a 30-sec task… until it breaks because of wrong ~/.ssh permissions or sshd_config 😅

@uday_devops true, keep the setup simple and test end to end

@uday_devops What are the correct file permissions for each file?

@uday_devops Through SSH keys: We need to generate SSH keys: Public key needs to be added to the server and we need to connect with a private key. When both private and key matches.We will have access to server

@uday_devops They are really asking these questions in 2026?

@uday_devops Ssh private and public key with ssh agent and a well defined config file.

@uday_devops ssh-keygen Ssh-copy-id

@uday_devops copy the public key to the server’s authorized_keys, set proper permissions, and optionally disable password authentication for key-only login