Rsync 비밀번호 없이 실행하기 (Exec Rsync without Password)

Crontab Rsync without Password

1. local 서버에서 ssh-keygen 을 실행하여 "id_rsa.pub" 파일을 작성한다.
(by running "ssh-copy-id", sent the file - "id_rsa.pub" to the Remote Server.)

2. 작성된 "id_rsa.pub" 파일을 "ssh-copy-id" 를 실행하여 Remote Server 로 전송한다.
( by running ssh-keygen, make the file "id_rsa.pub" to be written on local server)

3. Rsync를 실행하여 패스워드 없이 접속되는 것을 확인한다.
(confirm to execute Rsync ...)

- 로컬 서버와 Remote 서버에 ssh-keygen 으로 만든 같은 비밀번호가 저장되어 있으므로, IP가 변경이 되어도 패스워드 없이 계속 접속할 수 있다.


예제(example)

> ssh-keygen
Enter file in which to save the key (/root/.ssh/id_rsa):
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:
c9:b8:27:a2:bd:xx:xx:xx:xx:34:a5:ef:89:f1:ec:ec root@www6.gettyimageskorea.com
The key's randomart image is:
+--[ RSA 2048]----+
| |
| |
| . |
| xxxxx |
| xxxxxx |
| . o . |
| xxxxxx |
| xxxxxxxx . |
| . +xxxxx+. |
+-----------------+

> ssh-copy-id -i ~/.ssh/id_rsa.pub xxx.xxx.xxx.xxx
root@xxx.xxx.xxx.xxx's password:

Now try logging into the machine, with "ssh '121.78.196.150'", and check in:

.ssh/authorized_keys

to make sure we haven't added extra keys that you weren't expecting.

done.
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