How to Setup SSH Login Without Password on RHEL 7

ssh (SSH client) is a program for logging into a remote machine and for executing commands on a remote machine.  It is intended to provide secure encrypted communications between two untrusted hosts over an insecure network.  X11 connections, arbitrary TCP ports and UNIX-domain sockets can also be forwarded over the secure channel.

ssh connects and logs into the specified hostname (with optional user name).  The user must prove his/her identity to the remote machine using one of several methods

Preparation

Here I have prepared 2 servers, And I intend to schedule a backup of files from server 1 to server 2

1. Server 1 : 192.168.172.144
2. Server 2 : 192.168.172.145

Step One :

Type command on Server 1

# ssh-keygen ( enter, enter, enter )

Setup SSH Login Without Password

Step Two : 

Stay on server 1 and write the next command to introduce server 2

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

Step Three :

Try ssh login from Server 1 to Server 2

# ssh -i ~/.ssh/id_rsa 192.168.172.145 
# ssh [email protected]

if you used the other port can try this methode

# ssh-copy-id -i ~/.ssh/id_rsa.pub "-p 5678 [email protected]"

Makesure its Worked

And then we try to transfer files from server 1 to server 2 

# scp onemore.txt [email protected]:/home