如何在没有提示的情况下执行ssh-keygen [英] How to execute ssh-keygen without prompt

问题描述

我想在Centos7上使用shell脚本自动生成一对ssh密钥，而我已经尝试过

I want to automate generate a pair of ssh key using shell script on Centos7, and I have tried

yes "y" | ssh-keygen -t rsa
echo "\n\n\n" | ssh-keygen...
echo | ssh-keygen..

所有这些命令都不起作用，只需输入一个"enter"，shell脚本就停止在"Enter passphrase(空无密码)"上， 我只想知道如何在外壳中连续模拟多个输入".

all of these command doesn't work, just input one 'enter' and the shell script stopped on "Enter passphrase (empty for no passphrase)", I just want to know how to simulate mutiple 'enter' in shell continuously.

非常感谢任何人的帮助！

Many thanks if anyone can help !

推荐答案

只需使用无效通行证，并使用-N标志:

ssh-keygen -t rsa -N ''

要覆盖密钥文件(在本示例中为id_rsa):

 ssh-keygen -q -t rsa -N '' -f ~/.ssh/id_rsa 2>/dev/null <<< y >/dev/null

在ssh-keygen man 页面上:

  -N new_passphrase provides the new passphrase.
  -q                silence ssh-keygen.
  -f filename       specifies the filename of the key file.

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分步说明

$ ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/klashxx/.ssh/id_rsa):

1 )为避免输入密钥，请使用-f:

1) To avoid entering the key use -f:

$ ssh-keygen -t rsa -f ~/.ssh/id_rsa
Generating public/private rsa key pair.
/home/klashxx/.ssh/id_rsa already exists.
Overwrite (y/n)?

2 )现在，我们需要自动回答覆盖问题的" y "(让我们使用

2) Now we need to answer "y" automatically to the overwrite question (let's use a here-string for that job):

$ ssh-keygen -t rsa -f ~/.ssh/id_rsa <<< y
Generating public/private rsa key pair.
/home/klashxx/.ssh/id_rsa already exists.
Overwrite (y/n)? Enter passphrase (empty for no passphrase):

3 )最后，我们将使用-N标志输入无效通行证:

3) Finally we're going to use the -N flag to enter a void pass:

$ ssh-keygen -t rsa -N '' -f ~/.ssh/id_rsa <<< y
Generating public/private rsa key pair.
/home/klashxx/.ssh/id_rsa already exists.
Overwrite (y/n)? Your identification has been saved in /home/klashxx/.ssh/id_rsa.
Your public key has been saved in /home/klashxx/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:Xo0t6caMB/8TSsigxfY28JIfqYjyqxRZrFrPncx5yiU klashxx@server
The key's randomart image is:
+---[RSA 2048]----+
|                 |
|  .              |
|   o .           |
|  +   *    =     |
| +.  + BSo= o    |
|...o.+o+XO...    |
|.. .o.E==+B. .   |
|o . ...=.o...    |
|.+o.  o     ..   |
+----[SHA256]-----+

4 )多余的球，清理输出，只需检查返回码即可:

4) Extra ball, cleanup the output, just check the return code:

$ ssh-keygen -q -t rsa -N '' -f ~/.ssh/id_rsa 2>/dev/null <<< y >/dev/null
$ echo $?
0

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荣誉

@ lukasz-dynowski，@ redochka，@ mellow-yellow和该线程中的其他人.

@lukasz-dynowski, @redochka, @mellow-yellow and the rest of the folks in this thread.

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