簡明：shell腳本建立linux主機間信任關係。
1、確保已建立信任連接。
建立信任連接方法。在A生成ssh空密碼密鑰，並拷貝到B。
$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/damon/.ssh/id_rsa):
Created directory '/home/damon/.ssh'.
Enter passphrase (empty for no passphrase): #不輸入密碼
Enter same passphrase again:
Your identification has been saved in /home/damon/.ssh/id_rsa.
Your public key has been saved in /home/damon/.ssh/id_rsa.pub.
The key fingerprint is:
48:22:5e:35:93:ae:d1:04:03:5a:69:ff:eb:a9:c9:6a [email protected]
The key's randomart image is:
+--[ RSA 2048]----+
| ooo.+. |
| oo ooo |
|....o+. |
| . oooo. |
| . +. S |
| . . |
| . |
| E. ... |
| ...+oo |
+-----------------+拷貝公鑰。
$ scp .ssh/id_rsa.pub damon@192.168.0.188:/home/damon/.ssh/id_rsa.pub1遠程到B，並把公鑰寫入~/.ssh/authorized_keys。
$ cat id_rsa.pub1 >> authorized_keys設置文件權限。.ssh爲700，authurized_keys爲600。
$ chmod 700 .ssh
$ chmod 600 authorized_keys此時，可以在A中空密碼遠程到B。
$ ssh 192.168.0.188
Last login: Mon Aug 24 08:53:51 2015
$