小编给大家分享一下Linux中如何使用ssh-keygen命令,相信大部分人都还不怎么了解,因此分享这篇文章给大家参考一下,希望大家阅读完这篇文章后大有收获,下面让我们一起去了解一下吧!
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。
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]
-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。
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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