如何非交互式运行 ssh-keygen 生成 SSH 密钥文件

问题：

如果你想使用 ssh-keygen 生成密钥文件，它会提示你输入密钥密码：

ssh-keygen-noninteractive.sh

$ ssh-keygen -t ed25519 -f id_ed255194
Generating public/private ed25519 key pair.
Enter passphrase (empty for no passphrase):

$ ssh-keygen -t ed25519 -f id_ed255194
Generating public/private ed25519 key pair.
Enter passphrase (empty for no passphrase):

但对于脚本和自动化部署，你想避免提示并禁用密钥的密码加密。

解决方案

使用 -N "" 设置空密码：

ssh_keygen_noninteractive.sh

ssh-keygen -t ed25519 -f id_ed25519 -N ""

ssh-keygen -t ed25519 -f id_ed25519 -N ""

例如：

ssh_keygen_example_output.txt

$ ssh-keygen -t ed25519 -f id_ed25519 -N ""
Generating public/private ed25519 key pair.
Your identification has been saved in id_ed25519
Your public key has been saved in id_ed25519.pub
The key fingerprint is:
SHA256:o/PVrBXpccLOjrVi6vfGWcmNtoubpINfrMxbz4EXtrU uli@uli-desktop
The key's randomart image is:
+--[ED25519 256]--+
|                 |
|                 |
|                 |
|           . .   |
|        S   *.++.|
|       . . B B*+o|
|      o  ...#++E |
|       o.+=%+B.. |
|       .+=X*B.+. |
+----[SHA256]-----+

$ ssh-keygen -t ed25519 -f id_ed25519 -N ""
Generating public/private ed25519 key pair.
Your identification has been saved in id_ed25519
Your public key has been saved in id_ed25519.pub
The key fingerprint is:
SHA256:o/PVrBXpccLOjrVi6vfGWcmNtoubpINfrMxbz4EXtrU uli@uli-desktop
The key's randomart image is:
+--[ED25519 256]--+
|                 |
|                 |
|                 |
|           . .   |
|        S   *.++.|
|       . . B B*+o|
|      o  ...#++E |
|       o.+=%+B.. |
|       .+=X*B.+. |
+----[SHA256]-----+

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