SSH : Passwordless Login Using SSH Keygen

Client : 192.168.0.100

Remote : 192.168.0.254

1. Create Authentication SSH-Keygen Keys Client

#ssh-keygen -t rsa

2. Create .ssh Directory on Remote

#ssh root@192.168.0.254 mkdir -p .ssh

3. Upload Generated Public Keys to Remote

#cat .ssh/id_rsa.pub | ssh root@192.168.0.254 'cat >> .ssh/authorized_keys'

4. Set Permissions on Remote

#ssh root@192.168.0.254 "chmod 700 .ssh; chmod 640 .ssh/authorized_keys"

5. SSH Login from Client to Remote host without Password

#ssh root@192.168.0.254

Source:

https://www.tecmint.com/ssh-passwordless-login-using-ssh-keygen-in-5-easy-steps/