SSH without password login access under Linux

On the 192.168.9.51 machine.
1) Run: #ssh-keygen-t RSA
2) Then take two returns (select default)
3) Run: #ssh-copy-id-i/root/.ssh/id_rsa.pub [email protected]
4) Re-enter the root password on the 17 machine
At this point, ssh to the 17 machine, you do not need a password. SCP between each other, and no password required

5) The diagram is convenient to add aliases #alias 79.17= ' ssh [email protected] ' after the direct input #79.17 OK

SSH without password login access under Linux