ssh 证书登录,ssh 双机无密码互通

SSH证书登录

使用任意工具生成密钥对,可用工具如puttygen或你所使用的SSH登录工具, 也可以是linxu系统中的ssh-keygen

Puttygen示例:

puttygen 生成时加密方式选择:  SSH-2 RSA

保存公钥/私钥,在服务器上执行以下命令:

mkdir ~/.ssh
touch ~/.ssh/authorized_keys

#权限设置(RHEL/CENTOS系统必需)
chmod 700 ~/.ssh

chmod 600 ~/.ssh/authorized_keys
将公钥中的内容复制到authorized_keys文件

将私钥导入你自已的登录工具,如:putty 即可免密码登录

 

ssh-keygen示例:

$ ssh-keygen -t rsa -b 2048

一直回车完成生成id_rsa与id_rsa.pub

mkdir ~/.ssh
touch ~/.ssh/authorized_keys

#权限设置(RHEL/CENTOS系统必需)
chmod 700 ~/.ssh

chmod 600 ~/.ssh/authorized_keys
将id_rsa.pub中的内容复制到authorized_keys文件

将id_rsa下载/导入你自已的登录工具,若使用putty需先使用puttygen导入密钥后存储为ppk格式

 

 

LINUX相互免密码互通: 

 使用ssky-keygen和ssh-copy-id设置而无需输入密码就能登录远程Linux主机。 

1、ssh-keygen 创建公钥和密钥。 

2、ssh-copy-id 把本地主机的公钥复制到远程主机的authorized_keys文件上。

注:ssh-copy-id 也会给远程主机的用户主目录(home)和~/.ssh, 和~/.ssh/authorized_keys设置合适的权限 。

 

本地拷贝远程:

步骤1: 用 ssh-key-gen 在本地主机上创建公钥和密钥

ligh@local-host$ ssh-keygen -t  rsa

Enter file in which to save the key (/home/jsmith/.ssh/id_rsa):[Enter key] 

Enter passphrase (empty for no passphrase): [Press enter key]

Enter same passphrase again: [Pess enter key]

Your identification has been saved in /home/jsmith/.ssh/id_rsa.

Your public key has been saved in /home/jsmith/.ssh/id_rsa.pub. 

The key fingerprint is: 33:b3:fe:af:95:95:18:11:31:d5:de:96:2f:f2:35:f9 

ligh@local-host



步骤2: 用 ssh-copy-id 把公钥复制到远程主机上

ligh@local-host$ ssh-copy-id -i ~/.ssh/id_rsa.pub  root@192.168.0.3

ligh@remote-host‘s password:

Now try logging into the machine, with ―ssh ?remote-host‘‖, and check in: 

.ssh/authorized_keys to make sure we haven‘t added extra keys that you weren‘t expecting.

[注: ssh-copy-id 把密钥追加到远程主机的 .ssh/authorized_key 上.]



步骤3: 示例,直接登录远程主机

ligh@local-host$ ssh 192.168.0.3使用下例中ssky-keygen和ssh-copy-id,仅需通过3个步骤的简单设置而无需输入密码就能登录远程Linux主机。 

ssh-keygen 创建公钥和密钥。 

ssh-copy-id 把本地主机的公钥复制到远程主机的authorized_keys文件上。

ssh-copy-id 也会给远程主机的用户主目录(home)和~/.ssh, 和~/.ssh/authorized_keys设置合适的权限 。



步骤1: 用 ssh-key-gen 在本地主机上创建公钥和密钥

ligh@local-host$ ssh-keygen -t  rsa

Enter file in which to save the key (/home/jsmith/.ssh/id_rsa):[Enter key] 

Enter passphrase (empty for no passphrase): [Press enter key]

Enter same passphrase again: [Pess enter key]

Your identification has been saved in /home/jsmith/.ssh/id_rsa.

Your public key has been saved in /home/jsmith/.ssh/id_rsa.pub. 

The key fingerprint is: 33:b3:fe:af:95:95:18:11:31:d5:de:96:2f:f2:35:f9 

ligh@local-host



步骤2: 用 ssh-copy-id 把公钥复制到远程主机上

ligh@local-host$ ssh-copy-id -i ~/.ssh/id_rsa.pub  root@192.168.0.3

ligh@remote-host‘s password:

Now try logging into the machine, with ―ssh ?remote-host‘‖, and check in: 

.ssh/authorized_keys to make sure we haven‘t added extra keys that you weren‘t expecting.

[注: ssh-copy-id 把密钥追加到远程主机的 .ssh/authorized_key 上.]



步骤3: 直接登录远程主机

ligh@local-host$ ssh 192.168.0.3

Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2 

[注: SSH 不会询问密码.] 

ligh@remote-host$ 

[注: 你现在已经登录到了远程主机上]


Last login: Sun Nov 16 17:22:33 2008 from 192.168.1.2 

[注: SSH 不会询问密码.] 

ligh@remote-host$ 

[注: 你现在已经登录到了远程主机上]

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