Question

我在Ubuntu os上配置hadoop。我需要创建RSA密钥对以允许hadoop与其节点进行交互，因此我运行此命令：

hadoop@ubuntu:~$ ssh-keygen -t rsa -P ""

然后我明白了：

Generating public/private rsa key pair.
Enter file in which to save the key (/home/hadoop/.ssh/id_rsa):
Could not create directory '/home/hadoop/.ssh': permission denied.
Enter passphrase (empty for no passphrase ):
Enter same passphrase again:
open /home/hadoop/.ssh/id_rsa failed: No such file or directory.
Saving the key failed: /home/hadoop/.ssh/id_rsa.

Answer 1

忘记在家中创建.ssh目录？

试试：

mkdir -p ~/.ssh

然后重新运行ssh-keygen。

也可能是你从错误的用户那里创建了ssh-key ..你是用sudo启动那个shell的？

尝试手动设置HOME目录或在提示符下输入正确的路径。

Answer 2

检查您的主目录名称和权限

             echo $HOME
             cd ~ ; ls -l 
             ls -l .ssh
             ls -lR .ssh

如果上面的输出正常并且你有正确的权限，那么你的配额可能已满了

尝试“sudo”，看看会发生什么......

Answer 3

似乎当前用户不拥有主目录下的内容。

获得所有权，如下所示：

admin@mydb22-02:~$ sudo chown admin.admin /home/admin/
admin@mydb22-02:~$ ls -la
total 32
drwxr-xr-x 2 admin admin 4096 Nov  3 23:29 .
drwxr-xr-x 3 admin admin 4096 Dec 23  2012 ..
-rw------- 1 admin admin  191 Feb 13  2013 .bash_history
-rw-r--r-- 1 admin admin  220 Apr  3  2012 .bash_logout
-rw-r--r-- 1 admin admin 3486 Apr  3  2012 .bashrc
-rw-r--r-- 1 admin admin  675 Apr  3  2012 .profile
-rw-r--r-- 1 admin admin    0 Nov  3 23:29 .sudo_as_admin_successful
-rw------- 1 admin admin 4221 Nov  3 20:31 .viminfo

生成密钥现在可以正常工作，因为.ssh目录现在将在生成不对称密钥后由当前用户创建和拥有

Answer 4

I have spent arround 1 hr on this and finally got the solution. It is due to permission problem. You have to use chown for your 'hadoop user'.

1. First make hadoop directory.
cd /home 
mkdir hadoop
then check 'ls -l'. it gives result like :
drwxr-xr-x  2 hadoop hadoop 4096 Aug 22 22:17 hadoop

2. sudo chown hadoop.hadoop /home/hadoop/
3. Then run remaining command for key generater.

无法创建目录/home/hadoop/.ssh：权限被拒绝？

4 个答案: