ssh 免密登陆

说明:默认已经安装有ssh服务场景：A、B两台主机，A主机免密登陆B主机

步骤如下:

A主机生成密钥

ssh-keygen -t rsa -P ''

1. 将公钥添加到B机
   authorized_keys权限为600

scp .ssh/id_rsa.pub user@host:~/.ssh/authorized_keys

或者

scp .ssh/id_rsa.pub user@host:~/.ssh/id_rsa.pub.a
cat id_rsa.pub.a>>authorized_keys

设置权限

chmod 600 authorized_keys

免密登陆

ssh user@host

添加主机

vim /etc/hosts