[置顶] 【linux ssh免密码登录】linux 免密码登录

**配置主机之间的免密ssh登陆

vi /etc/hosts

127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4

::1 localhost localhost.localdomain localhost6 localhost6.localdomain6

192.168.81.130 node1

192.168.81.131 node2

192.168.81.132 node3

scp -r local_folder remote_username@remote_ip:remote_folder

scp -r /etc/hosts root@node2:/etc/hosts 将hosts文件传输到别的节点进行覆盖

假如 A 要登陆 B

在A上操作：

%%首先生成密钥对

ssh-keygen (提示时，直接回车即可)

%%再将A自己的公钥拷贝并追加到B的授权列表文件authorized_keys中

ssh-copy-id B

每台机器都要相互的做

例子：

[root@node1 ~]# ssh-keygen

Generating public/private rsa key pair.

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

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:

bd:93:26:5a:31:ae:40:13:6e:fd:38:94:7a:a8:be:76 root@node1

The key’s randomart image is:

+–[ RSA 2048]—-+

| |

| |

| . |

| . o . . |

| = + S . |

| o = + o o |

| + + = = |

| ..Eo = o . |

| o+o o |

+—————–+

[root@node1 ~]# ssh-copy-id node1

The authenticity of host ‘node1 (192.168.116.128)’ can’t be established.

RSA key fingerprint is 3f:f4:32:b4:24:1c:07:d3:55:d1:f5:1b:c2:7d:8c:3e.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added ‘node1,192.168.116.128’ (RSA) to the list of known hosts.

root@node1’s password:

Now try logging into the machine, with “ssh ‘node1’”, and check in:

.ssh/authorized_keys

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

将安装的jdk复制到别的机器上面

scp -r /usr/local/jdk-7u45 root@node2:/usr/local/

scp -r /etc/profile root@node2:/etc/profile

然后再在node2上面source /etc/profile