Linux免密登录

Linux下生成秘钥

执行如下命令：

ssh-keygen -t rsa

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执行之后会在用户的根目录生成一个 “.ssh”的文件夹

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进入“.ssh”会生成以下几个文件

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远程免密登录

通过ssh-copy-id上传远程服务器

命令： ssh-copy-id -i ~/.ssh/id_rsa.put

举例：

[root@test .ssh]# ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.91.135 
[email protected]'s password: 
Now try logging into the machine, with "ssh '192.168.91.135'", and check in:
 
.ssh/authorized_keys
 
to make sure we haven't added extra keys that you weren't expecting.
 
[root@node3 .ssh]# ssh [email protected]
Last login: Mon Oct 10 01:25:49 2016 from 192.168.91.133
[root@localhost ~]#

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通过ssh 登录测试

常见错误：

[root@node1 ~]# ssh-copy-id -i ~/.ssh/id_rsa.pub 192.168.91.135

-bash: ssh-copy-id: command not found //提示命令不存在

解决办法：yum -y install openssh-clients

参考链接：Linux下实现免密码登录(超详细)