Linux ssh无密钥登录

1. 单向无密钥配置

station213 -> station220：

步骤一：

输入命令： ssh-keygen 一路回车。。

[root@station213 ~]# ssh-keygen 
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa): 
/root/.ssh/id_rsa already exists.
Overwrite (y/n)? 

步骤二：

生成文件： id_rsa  id_rsa.pub

[root@station213 ~]# cd ~/.ssh/
[root@station213 .ssh]# ls
id_rsa  id_rsa.pub  known_hosts

步骤三：

拷贝文件：id_rsa.pub 到目标机器 station220，并改名为：authorized_keys

[root@station213 .ssh]# scp id_rsa.pub 192.168.101.220:~/.ssh/authorized_keys

步骤四：

登录验证：没有提示输入密码，无密钥登录配置成功。

[root@station213 .ssh]# ssh 192.168.101.220
Last login: Fri Mar 22 11:18:25 2013 from 192.168.101.213
[root@station220 ~]# 

双向无密钥配置同上。。。

2. 多台机器间无密钥配置

举例如：station213 -> station220：

                station220 -> station213：

步骤一：

station213 -> station220：

[root@station213 .ssh]# ssh-copy-id -i id_rsa.pub [email protected]
10
Now try logging into the machine, with "ssh '[email protected]'", and check in:


  .ssh/authorized_keys


to make sure we haven't added extra keys that you weren't expecting.


[root@station213 .ssh]# ssh-copy-id -i id_rsa.pub [email protected]
10
[email protected]'s password: 
Now try logging into the machine, with "ssh '[email protected]'", and check in:


  .ssh/authorized_keys


to make sure we haven't added extra keys that you weren't expecting.


[root@station213 .ssh]# ssh 192.168.101.220
Last login: Fri Mar 22 11:30:05 2013 from 192.168.101.213
[root@station220 ~]# 

步骤二：

station213 -> station221：同上。。