1、在客户机上root用户登陆的情况下，创建密钥对
[root@localhost ~]# ssh-keygen -t ecdsa
2、进入存放密匙的文件夹
[root@localhost ~]# cd .ssh/ # 存放密钥的文件夹
[root@localhost .ssh]# ls
id_ecdsa id_ecdsa.pub known_hosts
# id_ecdsa.pub 公钥
# id_ecdsa 私钥
3、上传公钥到服务器里
[root@localhost .ssh]# ssh-copy-id -i id_ecdsa.pub [email protected] -p 22
4、验证免密通道是否配置成功
[root@localhost .ssh]# ssh [email protected]
Last login: Mon Jul 13 17:02:14 2020 from 192.168.0.83
[root@localhost ~]#
[root@localhost .ssh]# scp /etc/passwd [email protected]:/boot
passwd 100% 967 21.3KB/s 00:00
[root@localhost .ssh]# scp -r [email protected]:/boot .