配置ssh无密码登陆

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好几次都双机互配后才wanshi ,总记不住方向,记到这儿

A要链接B，A把自己的公钥给B

1
zxw@hostUbuntu1:~$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/zxw/.ssh/id_rsa):
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/zxw/.ssh/id_rsa.
Your public key has been saved in /home/zxw/.ssh/id_rsa.pub.
The key fingerprint is:
f0:c0:a1:2b:67:4a:23:77:9a:17:0c:23:4d:47:25:74 zxw@hostUbuntu1
The key's randomart image is:
+--[ RSA 2048]----+
| .o=.E          |
| o . = .         |
|. + . +          |
| . + . +         |
|. = B   S        |
| + X .           |
| + .            |
|   .             |
|                 |
+-----------------+

2
zxw@hostUbuntu1:~$ scp ~/.ssh/id_rsa.pub ip:.ssh/id_rsa_ppas1.pub

3
zxw@hostUbuntu2:~$ touch .ssh/authorized_keys

4
zxw@hostUbuntu2:~$ cat .ssh/id_rsa_11.pub >> .ssh/authorized_keys
就可以从hostUbuntu1无密码登陆到hostUbuntu2了

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