centos配置ssh免密碼登入後，仍提示輸入密碼

1.生成公鑰和私鑰

2.匯入公鑰到認證檔案,更改許可權

3.測試

shell**

ssh-keygen -t dsa -p '' -f ~/.ssh/id_dsa

預設在 ~/.ssh目錄生成兩個檔案：

id_rsa ：私鑰

id_rsa.pub ：公鑰

2.1 匯入本機

shell**

cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys

2.2 匯入要免密碼登入的伺服器

首先將認證檔案複製到伺服器

shell**

scp ~/.ssh/authorized_keys ***@主機名:/home/***/.ssh/

一般以上幾步就ok了，但我的仍要輸入密碼，

用root使用者登陸檢視系統的日誌檔案：$tail /var/log/secure -n 20

oct 7 10:26:43 masterserver sshd[2734]: authentication refused: bad ownership or modes for file /home/hadooper/.ssh/authorized_keys

oct 7 10:26:48 masterserver sshd[2734]: accepted password for hadooper from ::1 port 37456 ssh2

oct 7 10:26:48 masterserver sshd[2734]: pam_unix(sshd:session): session opened for user hadooper by (uid=0)

oct 7 10:36:30 masterserver sshd[2809]: accepted password for hadooper from 192.168.1.241 port 36257 ssh2

oct 7 10:36:30 masterserver sshd[2809]: pam_unix(sshd:session): session opened for user hadooper by (uid=0)

oct 7 10:38:28 masterserver sshd[2857]: authentication refused: bad ownership or modes for directory /home/hadooper/.ssh

shell**

chmod 700 ~/.ssh

chmod 600 ~/.ssh/authorized_keys

ssh host，第一次登入可能需要yes確認，之後就可以直接登入了。

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