HP-UX SSH Password 없이 login 하기

HP-UX 에서 ssh 를 사용하요 password 없이 바로 login 하는 방법입니다.

HP-UX 에서도 OpenSSH 를 사용 합니다.. ㅎㅎ

일반적으로 ssh 를 사용을 하게 되면 암호화된 password 를 사용하거나 , RSA, DSA Key 를 사용하여 Login 을 하게 됩니다.

Password 없이 Login 을 하기 위해서는 RSA, DSA Key 를 사용 하게 됩니다.

RSA 는 SSH1 을 지원하고 DSA 는 SSH2 를 지원 합니다. 

1. RSA Key 사용

[user@host1:/home/user]$ ssh-keygen -t rsa

Generating public/private rsa key pair.

Please be patient....   Key generation may take a few minutes

Enter file in which to save the key (/home/user/.ssh/id_rsa):               <- Key 경로 (그냥 엔터)

Enter passphrase (empty for no passphrase):                                     <- Key Password ( 그냥 엔터)

Enter same passphrase again:                                                          <- Key Password 확인 (그냥 엔터)

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

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

The key fingerprint is:

c8:66:a6:6b:7b:4b:5b:6c:95:8b:b1:e6:45:ac:62:bb user@uctmpdb1

The key's randomart image is:

+--[ RSA 2048]----+

|                 |

|                 |

|                 |

|     . . . .     |

|      * S =      |

|     = . B .     |

|    . + O o      |

|    .+.O .       |

|   .ooEo.        |

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

[user@host1:/home/user/.ssh]$ ll

-rw-------   1 inf03217   wheel         1679 2월 22일 14:37 id_rsa

-rw-r--r--   1 inf03217   wheel          399 2월 22일 14:37 id_rsa.pub

[user@host1:/home/user/.ssh]$ cat id_rsa.pub

ssh-rsa AAAAB3NzaC1yc2EADDDDDAQABAAABAQCsoULSGD5oDC67OsHfZJ5ohAsR1bQxA7mhMRHW5p77wY3+F4jivB8RdgaDWPFmaxRvirEKvYmgd47dk7deHnFFAdJfPZIgtubLVaBOnldbHh49BUOOrcVJyjmOv8RRIX6b5dUefikCpxG2IfU2qetuAM4fWX9XrvQ1bUw7xLm1yr077VmI3K36w+ZFPxtr21Cr2dZRxpiqBlXdE+Se2S8254o9VZbMd0O56ice3IQQYDOMdi1+a7IK3rgJ98EFke6m5aEUJdHTIXohVef9Jq2cv4O7CwTGcusRww2hJZy5io4MFtRNvX9cT4zPPDloQko20ImTxL7TNtrLsW+JSZmV user@host1

ssh-keygen 으로 RSA Private Key, Public Key 를 생성 합니다.

생성한 Public Key 를 원격 호스트에 복사해 놓으시면 끝!!

[user2@host2:/home/user/.ssh]$ vi authorized_keys
AAAAB3NzaC1yc2EADDDDDAQABAAABAQCsoULSGD5oDC67OsHfZJ5ohAsR1bQxA7mhMRHW5p77wY3+F4jivB8RdgaDWPFmaxRvirEKvYmgd47dk7deHnFFAdJfPZIgtubLVaBOnldbHh49BUOOrcVJyjmOv8RRIX6b5dUefikCpxG2IfU2qetuAM4fWX9XrvQ1bUw7xLm1yr077VmI3K36w+ZFPxtr21Cr2dZRxpiqBlXdE+Se2S8254o9VZbMd0O56ice3IQQYDOMdi1+a7IK3rgJ98EFke6m5aEUJdHTIXohVef9Jq2cv4O7CwTGcusRww2hJZy5io4MFtRNvX9cT4zPPDloQko20ImTxL7TNtrLsW+JSZmV user@host1

이제 원격 호스트로 접속을 하게 되면 Password 없이 로그인이 가능 합니다..

2. DSA Key 사용

[user@host1:/home/user]$ ssh-keygen -t dsa

Generating public/private dsa key pair.

Enter file in which to save the key (/home/user/.ssh/id_dsa): 

Enter passphrase (empty for no passphrase): 

Enter same passphrase again: 

Your identification has been saved in /home/user/.ssh/id_dsa.

Your public key has been saved in /home/user/.ssh/id_dsa.pub.

The key fingerprint is:

91:89:ad:7a:d3:21:cc:ac:f8:7a:65:d2:53:44:8a:38 user@uctmpdb1

The key's randomart image is:

+--[ DSA 1024]----+

|       ..        |

|   . . +.o       |

|  E . o.=        |

|   . + ...       |

|     .*.S        |

|   ..o=o .       |

|  . o+o..        |

|   ... .         |

|  .o.            |

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

[user@host1:/home/user]$ cat id_dsa.pub
ssh-dss AAAAB3NzaC1kc3MAAACBAPULoMWZDawocVlpSWHYVXMPS++97/RqHej2DKGkfefAI+eVJxXXi6HI1jcwkBkcYBRmI+e6md0

JM+I/Gi0i+CYpnhIl/b409GsJiIdddpBBvmy2m7ablOW9aCBemL30qOqD9Mes6/Bnrctb+fFQbRwWzU1O8mahZLIK46UBZCtcNAA

AAFQC4W2skte1cK3YDBrXvbohnsCj+HQAAAIEA68YpP1T9ybUYbcnepShO8wetAzjrfC2718GbZIt3NJALqSdgnQZBLKKr1v2L

gvOyCak86b8MuTFbvSaCezvSe2Py2bTkCti1RBdNIwUOBAqCTYBzjL8mrHSZBIRXGsOczVh78cHjAFHAeM0he9nHcqJDXtB

iYJh0CgpPbkqQ9oIAAACAJle0NVZoEuXrTw9Yi80x7Eq9a9CW/f1Q6m46x7Bz3bvQCrpW8vT1eHdPwynY8vnrxOw6JFYXCi/o/

L5wSn11CW28pelWg632syHAnLUgDOyEScv6TTuIv58VWnA63TvX8YMy+dRoIgF11VgSnMU4WS3noSc3bLcGCarZsndAuAM

= user@host1

방법은 RSA 와 동일 합니다.. 이제 원격 host 에 Public Key 를 복사해 넣으면 됩니다.

[user2@host2:/home/user/.ssh]$ vi authorized_keys2