从私钥生成公钥 ssh 密钥 [英] Generate public ssh key from private key

问题描述

我有私人 ssh (id_rsa) 密钥.

I have private ssh (id_rsa) key.

我如何从中生成公钥?

推荐答案

选项 -y 输出公钥.来自 ssh-keygen 命令的 linux 手册:

The option -y outputs the public key. From the linux manual for the ssh-keygen command:

-y ---- 此选项将读取一个私有的 OpenSSH 格式文件并打印一个标准输出的 OpenSSH 公钥.

-y ---- This option will read a private OpenSSH format file and print an OpenSSH public key to stdout.

ssh-keygen -y -f ~/.ssh/id_rsa > ~/.ssh/id_rsa.pub

作为旁注，公钥的注释丢失了.我有一个需要评论的网站(Launchpad?)，所以您需要编辑 ~/.ssh/id_rsa.pub 并将评论附加到第一行，评论和关键数据之间有一个空格.下面显示了一个示例公钥.

As a side note, the comment of the public key is lost. I've had a site which required the comment (Launchpad?), so you need to edit ~/.ssh/id_rsa.pub and append a comment to the first line with a space between the comment and key data. An example public key is shown truncated below.

ssh-rsa AAAA..../VqDjtS5 ubuntu@ubuntu

如果您想要以脚本方式添加评论并将公钥添加到您的 authorized_keys 文件中，您可以这样做...

If you want a scripted way to add a comment and also add the pubkey to your authorized_keys file, you can do...

ssh-keygen -y -f ~/.ssh/id_rsa    | \
    sed 's/$/ comment-goes-here/' | \
    tee ~/.ssh/id_rsa.pub         | \
    tee -a authorized_keys

这篇关于从私钥生成公钥 ssh 密钥的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！