ssh配置无密码登录

Posted 2020-10-04 码农

1.在master机器上生成公钥：

[[email protected] ~]# ssh-keygen -t rsa    注：一直按enter键就可以生成了

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa): 

Created directory ‘/root/.ssh‘.

Enter passphrase (empty for no passphrase): 

Enter same passphrase again: 

Your identification has been saved in /root/.ssh/id_rsa.

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

The key fingerprint is:

81:39:eb:23:2c:f9:75:af:93:cb:76:00:87:3e:cf:0f [email protected]

The key‘s randomart image is:

+--[ RSA 2048]----+

|                 |

|       o         |

|      +..        |

|      oo..       |

|     ..oS        |

|   o .o .        |

|  o o ++Eo       |

|   o o +*o.      |

|    .  .+*o      |

+-----------------+

2..执行 cp id_rsa.pub authorized_keys

3.把master上面的authorized_keys文件复制到Slave机器上

  scp authorized_keys slave:~/.ssh

4..slave1上的修改.ssh目录的权限以及authorized_keys 的权限(这个必须修改，要不然还是需要密码)

sudo chmod 644 ~/.ssh/authorized_keys

 

sudo chmod 700 ~/.ssh

5.在master上登陆：

输入ssh slave1 不需密码登陆slave1则设置成功！

 

提示：master上想无密码登陆slave1,则需把master生成的公钥放到slave1上；反之，slave1想无密码登陆master，则需要把slave1的公钥放到master上。