ssh密钥的生成与使用

一客户端是linux

1.在客户端生成密钥对

[root@localhost ~]# ssh-keygen -t rsa       <== 建立密钥对,-t代表类型,有RSA和DSA两种
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):   <==密钥文件默认存放位置,按Enter即可
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase):     <== 输入密钥锁码,或直接按 Enter 留空
Enter same passphrase again:     <== 再输入一遍密钥锁码
Your identification has been saved in /root/.ssh/id_rsa.    <== 生成的私钥
Your public key has been saved in /root/.ssh/id_rsa.pub.    <== 生成的公钥
The key fingerprint is:
SHA256:K1qy928tkk1FUuzQtlZK+poeS67vIgPvHw9lQ+KNuZ4 [email protected]
The key's randomart image is:
+---[RSA 2048]----+
|           +.    |
|          o * .  |
|        . .O +   |
|       . *. *    |
|        S =+     |
|    .    =...    |
|    .oo =+o+     |
|     ==o+B*o.    |
|    oo.=EXO.     |
+----[SHA256]-----+
--------------------- 
版权声明:本文为CSDN博主「独孤柯灵」的原创文章,遵循CC 4.0 by-sa版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/u014721096/article/details/78553032

密钥锁码在使用私钥时必须输入,这样就可以保护私钥不被盗用。当然,也可以留空,实现无密码登录,这里密钥锁码设置为空。完成上述步骤后,在root用户的家目录中生成了一个.ssh的隐藏目录,内含两个密钥文件,其中id_rsa为私钥,id_rsa.pub为公钥。

复制生成的公钥到远程主机里面~/.ssh/authorized_keys文件中。如果没有.ssh目录,需要自己建立一个,并更改目录权限为700

[root@localhost ~]# mkdir ~/.ssh
[root@localhost ~]# chmod 700 ~/.ssh/
[root@localhost ~]# vim ~/.ssh/authorized_keys

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