SSH免密码登陆

来源：互联网发布：it软件开发工程师编辑：程序博客网时间：2024/04/28 18:52

在linux安装hadoop是为了以后操作方便可以进行免密码设置

1 . 在Xshell 输入 cd 回到当前用户界面

2 输入下面命令

ssh-keygen -t rsa "" 输入这个命令后一直回车就可以了

[root@hadoop ~]# ssh-keygen -t rsa
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)? y
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:
b4:75:7a:87:6b:48:4a:48:39:e4:6c:a3:11:fe:ad:38 root@hadoop
The key's randomart image is:
+--[ RSA 2048]----+
| . . |
| . = . |
| o O . . . |
| * * o o . |
| . o S o o . |
| . o o o o |
| E . . . o |
| . . |
| |
+-----------------+

出现如上所示，基本上一直按enter

2 将生成的公钥id_rsa.pub 内容追加到authorized_keys（执行命令：cat id_rsa.pub >> authorized_keys

[root@hadoop ~]# cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

安全起见，你可以退出linux再以root登陆进来一下，我是没做这个步骤

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