概述

首先，说实在的，这个已经被很多人说过了，但是，我是第一次用，没错，我就是这么out

操作

首先生成一个rsa秘钥
ssh-keygen -t rsa
之后把这个秘钥拷贝到远程主机上，用下面这个命令就够了
ssh-copy-id root@vultr.bboysoul.com

➜  ~ ssh-copy-id root@vultr.bboysoul.com
/usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed
/usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys
root@vultr.bboysoul.com's password: 

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh 'root@vultr.bboysoul.com'"
and check to make sure that only the key(s) you wanted were added.

之后你就可以免密登录了

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