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ssh-keygen命令用于为ssh生成管理和转换认证密钥

发布时间:2023-07-20 10:04:13 所属栏目:Linux 来源:转载
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。

  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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