sshkeygen命令用于为ssh生成管理和转换认证密钥

发布时间：2023-10-11 15:40:12 所属栏目：Linux 来源：

导读：Linux常用命令ssh-keygen命令用于为“ssh”生成、管理和转换认证密钥，它支持RSA和DSA两种认证密钥，下面为大家分享一下Linux常用命令ssh-keygen命令命令具体使用方法。

命令格式

语法

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Linux常用命令ssh-keygen命令用于为“ssh”生成、管理和转换认证密钥，它支持RSA和DSA两种认证密钥，下面为大家分享一下Linux常用命令ssh-keygen命令命令具体使用方法。

命令格式

语法

    ssh-keygen [-q] [-b bits] -t type [-N new_passphrase] [-C comment] [-f output_keyfile]

    ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]

    ssh-keygen -i [-f input_keyfile]

    ssh-keygen -e [-f input_keyfile]

    ssh-keygen -y [-f input_keyfile]

    ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]

    ssh-keygen -l [-f input_keyfile]

    ssh-keygen -B [-f input_keyfile]

    ssh-keygen -D reader

    ssh-keygen -F hostname [-f known_hosts_file]

    ssh-keygen -H [-f known_hosts_file]

    ssh-keygen -R hostname [-f known_hosts_file]

    ssh-keygen -U reader [-f input_keyfile]

    ssh-keygen -r hostname [-f input_keyfile] [-g]

    ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]

    ssh-keygen -T output_file -f input_file [-v] [-a num_trials] [-W generator]

常用选项

-b：指定密钥长度；

-e：读取openssh的私钥或者公钥文件；

-C：添加注释；

-f：指定用来保存密钥的文件名；

-i：读取未加密的ssh-v2兼容的私钥/公钥文件，然后在标准输出设备上显示openssh兼容的私钥/公钥；

-l：显示公钥文件的指纹数据；

-N：提供一个新密语；

-P：提供（旧）密语；

-q：静默模式；

-t：指定要创建的密钥类型。

参考示例

创建一个默认密钥

[root@localhost ~]# ssh-keygen

Generating public/private rsa key pair.

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:

SHA256:QfclO+AvXZ/O6vGNfzo4P2pftiHRoKG2fgc5p9bvu1o root@localhost.localdomain

The key's randomart image is:

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

|        . o . . |

|       . o o +   |

|        . ..+.. |

|         ..oooo..|

|        So..+. o.|

|        . .= .+ |

|         . *+ Eo|

|        . ++oO+=|

|         .o.+OO%*|

+----[SHA256]-----+

[root@localhost ~]#

指定要创建的密钥类型

[root@localhost ~]# ssh-keygen -t rsa

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa):

/root/.ssh/id_rsa already exists.

Overwrite (y/n)? y

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:

SHA256:nTaoqOxlG6IQQ2zDTMvSk2EON+4tLrYqPy7IBrstoy4 root@localhost.localdomain

The key's randomart image is:

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

|..=              |

|*B.+             |

|.X*              |

|+..o     o .     |

|o o .   S =      |

|.+ . . . . .     |

|*oo = .          |

|EBo= o           |

|%@B..            |

+----[SHA256]-----+

[root@localhost ~]#

使用-t参数创建一个指定密钥的类型并添加注释

[root@localhost ~]# ssh-keygen -t rsa -C "deng@qq.com"

Generating public/private rsa key pair.

Enter file in which to save the key (/root/.ssh/id_rsa):

/root/.ssh/id_rsa already exists.

Overwrite (y/n)? y

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:

SHA256:Wx3MWwj36fwhcnb6hjdIIJ3SUggCLcmFq62Earqy2E0 deng@qq.com

The key's randomart image is:

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

| ..*o .. o .    |

|   = .. . * o . |

|    o     + * + |

|   .     + * *   |

|. o     S =.++oo |

|.o .     o +.+..|

|o . E   .   ..o .|

|++ o         o.+ |

|Oo. .         o..|

+----[SHA256]-----+

[root@localhost ~]#

读取openssh的私钥或者公钥文件

[root@localhost ~]# ssh-keygen -e

Enter file in which the key is (/root/.ssh/id_rsa):

---- BEGIN SSH2 PUBLIC KEY ----

Comment: "2048-bit RSA, converted by root@localhost.localdomain from O"

AAAAB3NzaC1yc2EAAAADAQABAAABAQCyQ/iZYPZHH7+4Gcfq259xChnidsf25piKsnRi+o

/XZcD0s9QL8oX24OuX5pPQcmfD6Rw6sQCrTy66LrSw2NmPpKc0XdUbXEkLYBN4d3SY+ZLT

3Ot8L6jaDmwgXsBu8lTXzAEWLm+16RXAZAB/27ohi48PfcIDYyeJ1JDpieCJ1/a/KrR9V4

erWVBt/ZE8KoC0MTQlUn7H3oABVS9O6sdY4dYc/T9l33EbqZMc2feYZnuWtrPdrYfz37C+

kzg3ZrDojGXtiWk1p/PG5KoAH6GzuYYIuMtrUTnadRv4wZo29RF+n5Ty8HEeYqSceHWWvw

Jjqnpqj9cgeNQvq6E3PJbD

---- END SSH2 PUBLIC KEY ----

[root@localhost ~]#

安静模式生成密钥对

[root@localhost ~]# ssh-keygen -q -t rsa

Enter file in which to save the key (/root/.ssh/id_rsa):

/root/.ssh/id_rsa already exists.

Overwrite (y/n)? y

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

[root@localhost ~]#

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