ssh-login-auto

## ssh passwordless login

A. generate a public key ( this will create id_rsa / id_rsa.pub files in ~/.ssh folder )
		ssh-keygen
		
		# ex: prompt to comeplete	
		Generating public/private rsa key pair.
		Enter file in which to save the key (/home/heoyea/.ssh/id_rsa):[Press Enter key]
		Enter passphrase (empty for no passphrase): [Press Enter key]
		Enter same passphrase again: [Pess Enter key]
		Your identification has been saved in /home/heoyea/.ssh/id_rsa.
		Your public key has been saved in /home/heoyea/.ssh/id_rsa.pub.

	B1. copy local pub key to server pc (method 1)
		# this will send pub key and create ~/.ssh/authorized_keys file on server pc
		# Note: ssh-copy-id command will append keys, not overwrite it ( good for multiple keys)

		ssh-copy-id -i ~/.ssh/id_rsa.pub [email protected]

	B2. copy local pub key to server pc (method 2) - use if ssh-copy-id command on not on your system
		# send keys to server
		scp ~/.ssh/id_rsa.pub [email protected]:/tmp/

		# login to server pc then append keys manually
		cat /tmp/id_rsa.pub >> ~/.ssh/authorized_keys

		# remove public key file from tmp folder
		rm /tmp/id_rsa.pub