Quick way to enable SSH authentication via keyfile.

ssh_via_keyfile.md

Quick way to setup SSH via keyfile

On the remote host:

ssh-keygen -t rsa -b 2048

The key location is /root/.ssh/id_rsa.

Public key can be found in /root/.ssh/id_rsa.pub. Private key can be found in /root/.ssh/id_rsa.

NOTE: Permission of private key should be 0600.

On local host:

ssh-copy-id USER@HOST-IP

Note: You might need to execute : install openssh-clients.

Restrict password-based login:

Edit sshd_config file:

sudo nano /etc/ssh/sshd_config

and add PermitRootLogin without-password.

Finally execute: service sshd reload.