SSH - 无密码登录 · N3xtChen 的博客

第一步：生成 Key #

在你的机子上，使用 ssh-keygen 生成 RSA 私钥（你已经做了，可以跳过这一步）

	$ ssh-keygen -t rsa
	Generating public/private rsa key pair.
	# 这一步一般不修改，直接Enter使用默认值，否则你需要输入路径
	Enter file in which to save the key ({你的用户根目录}/.ssh/id_rsa): 
	# 这一步很重要，以为本文的主题是无密码登录，所以就直接回车
	Enter passphrase (empty for no passphrase): 
	Enter same passphrase again:
	Your identification has been saved in /home/username/.ssh/id_rsa
	Your public key has been saved in {你的用户根目录}/.ssh/id_sra.pub
	
	The key fingerprint is:
	ar:bc:d3:9e:g3:1f:63:6f:6b:32:2e:97:ee:42:e1:be n3xtchen@aybe.me
	
	The key’s randomart image is:
	
	+--[ RSA 2048]----+
	| ..+**B.o++o     |
	|  . o+==o. o     |
	|    . .oo.=      |
	|      . +E+ .    |
	|        S .      |
	|                 |
	|                 |
	|                 |
	|                 |
	+-----------------+

第二步：部署你的公钥到你需要登录的服务器上 #

Linux 下的步骤 #

$ ssh-copy-id -i ~/.ssh/id_rsa.pub username@hostname
/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
username@hostname's password:	# 输入服务器密码
Number of key(s) added: 1

Os X 下的步骤 #

$ cat ~/.ssh/id_rsa.pub | ssh username@server.dreamhost.com "mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys"
The authenticity of host 'server.dreamhost.com (208.113.136.55)' can't be established.
RSA key fingerprint is 50:46:95:5f:27:c9:fc:f5:f5:32:d4:3a:e9:cb:4f:9f.
Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'm.aybe.me, 0.0.0.0' (RSA) to the list of known hosts.

username@hostname's password:

步骤三：验证 #

必须确认文件权限：

然后使用命令登录：

$ ssh username@hostname

大功告成！🍻

参考文献
* https://help.dreamhost.com/hc/en-us/articles/216499537-How-to-configure-passwordless-login-in-Mac-OS-X-and-Linux * https://coolestguidesontheplanet.com/make-passwordless-ssh-connection-osx-10-9-mavericks-linux/