[hadoop@weekend110 ~]$ ssh-keygen -t rsa    用来生产密钥对

Generating public/private rsa key pair.

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

Enter passphrase (empty for no passphrase):   不要输入密码

Enter same passphrase again:

Your identification has been saved in /home/hadoop/.ssh/id_rsa.

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

The key fingerprint is:

7b:4a:0d:::ec:b6:0c:::d9:c6:c1:f8:: hadoop@weekend110

The key's randomart image is:

+--[ RSA ]----+

|.X.o.o.          |

|E B ...  .       |

| + . .. . .      |

|  o . o. .       |

| .   + .S        |

|      o  +       |

|        o o      |

|       . o       |

|        .        |

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

[hadoop@weekend110 ~]$ ll -a  密钥文件为隐藏 需要加-a

total

drwx------.  hadoop hadoop       Oct  : .

drwxr-xr-x.   root   root         Mar     ..

drwxrwxr-x.   hadoop hadoop       Oct  : app

-rw-------.   hadoop hadoop        Oct  : .bash_history

-rw-r--r--.   hadoop hadoop         Feb    .bash_logout

-rw-r--r--.   hadoop hadoop        Feb    .bash_profile

-rw-r--r--.   hadoop hadoop        Feb    .bashrc

drwxr-xr-x.   hadoop hadoop       Oct   : .cache

drwxr-xr-x.   hadoop hadoop       Oct   : .config

drwx------.   hadoop hadoop       Oct   : .dbus

-rw-------.   hadoop hadoop         Oct   : .esd_auth

drwx------.   hadoop hadoop       Oct  : .gconf

drwx------.   hadoop hadoop       Oct  : .gconfd

drwxr-xr-x.   hadoop hadoop       Oct   : .gnome2

drwx------.   hadoop hadoop       Oct   : .gnome2_private

drwxrwxr-x.   hadoop hadoop       Oct   : .gnote

drwx------.   hadoop hadoop       Oct  : .gnupg

drwxrwxr-x.   hadoop hadoop       Oct   : .gstreamer-0.10

-rw-rw-r--.   hadoop hadoop        Oct  : .gtk-bookmarks

drwx------.   hadoop hadoop       Oct   : .gvfs

-rw-rw-r--.   hadoop hadoop  Oct   : hadoop-2.4..tar.gz

-rw-------.   hadoop hadoop       Oct  : .ICEauthority

-rw-r--r--.   hadoop hadoop  Oct  : jdk-7u65-linux-i586.tar.gz

drwxr-xr-x.   hadoop hadoop       Oct   : .local

drwxr-xr-x.   hadoop hadoop       Oct   : .mozilla

drwxr-xr-x.   hadoop hadoop       Oct   : .nautilus

drwx------.   hadoop hadoop       Oct   : .pulse

-rw-------.   hadoop hadoop        Oct   : .pulse-cookie

drwx------.   hadoop hadoop       Oct  : .ssh

drwxr-xr-x.   hadoop hadoop       Oct   : Templates

-rw-------.   hadoop hadoop       Oct  : .viminfo

-rw-------.   hadoop hadoop        Oct  : .xsession-errors

-rw-------.   hadoop hadoop        Oct  : .xsession-errors.old

[hadoop@weekend110 ~]$ cd .ssh  进入密钥文件

[hadoop@weekend110 .ssh]$ ll

total

-rw-------.  hadoop hadoop  Oct  : id_rsa 私钥

-rw-r--r--.  hadoop hadoop   Oct  : id_rsa.pub  公钥

-rw-r--r--.  hadoop hadoop  Oct  : known_hosts

[hadoop@weekend110 .ssh]$ scp id_rsa.pub spark01:/home/hadoop   将密钥传到spark01机器，因为这里模拟，并没有次主机，错误正常

ssh: Could not resolve hostname spark01: Name or service not known

lost connection

[hadoop@weekend110 .ssh]$ 

此后在spark01配置 ，进入.SHH文件。第一次是没有authorized_key这个文件夹，用touch创建，创建之后将权限改为-rw-------即可。然后将公钥追加到此文件即可。

[hadoop@spark01 .ssh]$ cat ../id_rsa.pub >>./authorited_key   前面的../id_rsa.pub 代表的是前一个主机传过来的公钥，不是spark01中ssh文件里的id_rsa.pub 

结束。