ssh host based authentication

Goal: 類rlogin方式,使用免密碼登入特定主機

1: ssh server : enable the HostbasedAuthentication feature on ssh server.
2: ssh client : enable the HostbasedAuthentication and EnableSSHKeysign feature on ssh client
3: add rsa fingerprint to /etc/ssh/ssh_known_hosts :
issue: ssh-keyscan -vt rsa remote_machine >> /etc/ssh/ssh_known_hosts
4: add hosts that are permitted to use the HostbasedAuthentication method to logon to/etc/ssh/shosts.equiv
issue: echo +@linuxbox > /etc/ssh/ssh_known_hosts