如何使用ssh-keygen生成key

Posted 2023-04-01

ssh-keygen -N \'\' -t rsa -q -b 2048

原来是在 -N 后面新密码用\'\'，单引号里面什么都不填就可以了 参考技术A 如何生成SSH key

SSH key提供了一种与GitHub通信的方式，通过这种方式，能够在不输入密码的情况下，将GitHub作为自己的remote端服务器，进行版本控制

步骤

检查SSH keys是否存在

生成新的ssh key

将ssh key添加到GitHub中

如何生成SSH KEY

1. 检查SSH keys是否存在

输入下面的命令，如果有文件id_rsa.pub 或 id_dsa.pub，则直接进入步骤3将SSH key添加到GitHub中，否则进入第二步生成SSH key
ls -al ~/.ssh
# Lists the files in your .ssh directory, if they exist

2. 生成新的ssh key

第一步：生成public/private rsa key pair
在命令行中输入ssh-keygen -t rsa -C "[e-mail]"

默认会在相应路径下（/your_home_path）生成id_rsa和id_rsa.pub两个文件，如下面代码所示
ssh-keygen -t rsa -C "[e-mail]"
# Creates a new ssh key using the provided email
Generating public/private rsa key pair.
Enter file in which to save the key (/your_home_path/.ssh/id_rsa):

第二步：输入passphrase（本步骤可以跳过）

设置passphrase后，进行版本控制时，每次与GitHub通信都会要求输入passphrase，以避免某些“失误”
Enter passphrase (empty for no passphrase): [Type a passphrase]
Enter same passphrase again: [Type passphrase again]

sample result:
Your identification has been saved in /your_home_path/.ssh/id_rsa.
Your public key has been saved in /your_home_path/.ssh/id_rsa.pub.
The key fingerprint is:
#01:0f:f4:3b:ca:85:d6:17:a1:7d:f0:68:9d:f0:a2:db [e-mail]

第三步：将新生成的key添加到ssh-agent中:
# start the ssh-agent in the background
eval "$(ssh-agent -s)"
Agent pid 59566
ssh-add ~/.ssh/id_rsa

3. 将ssh key添加到GitHub中

用自己喜欢的文本编辑器打开id_rsa.pub文件，里面的信息即为SSH key，将这些信息复制到GitHub的Add SSH key页面即可

不同的操作系统，均有一些命令，直接将SSH key从文件拷贝到粘贴板中，如下：

mac
pbcopy < ~/.ssh/id_rsa.pub
# Copies the contents of the id_rsa.pub file to your clipboard

windows
clip < ~/.ssh/id_rsa.pub
# Copies the contents of the id_rsa.pub file to your clipboard

linux
sudo apt-get install xclip
# Downloads and installs xclip. If you don't have `apt-get`, you might need to use another installer (like `yum`)

xclip -sel clip < ~/.ssh/id_rsa.pub
# Copies the contents of the id_rsa.pub file to your clipboard本回答被提问者采纳

如何在TortoiseGit中使用ssh-keygen生成的key

参考技术A Git是分布式的代码管理工具，远程的代码管理是基于SSH的，所以要使用远程的Git则需要SSH的配置。
github的SSH配置如下：
1 、设置Git的user name和email：
$ git config --global user.name "xuhaiyan"
$ git config --global user.email "[e-mail]"

2、生成SSH密钥过程：
1）查看是否已经有了ssh密钥：cd ~/.ssh
如果没有密钥则不会有此文件夹，有则备份删除
2）生存密钥：
$ ssh-keygen -t rsa -C “[e-mail]”
按3个回车，密码为空。

Your identification has been saved in /home/tekkub/.ssh/id_rsa.
Your public key has been saved in /home/tekkub/.ssh/id_rsa.pub.
The key fingerprint is:

最后得到了两个文件：id_rsa和id_rsa.pub

3）添加密钥到ssh：ssh-add 文件名
需要之前输入密码。

4）在github上添加ssh密钥，这要添加的是“id_rsa.pub”里面的公钥。
打开https://github.com/ ，登陆xuhaiyan825，然后添加ssh。

5）测试：ssh [e-mail]
The authenticity of host ‘github.com (207.97.227.239)’ can’t be established.
RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added ‘github.com,207.97.227.239′ (RSA) to the list of known hosts.
ERROR: Hi tekkub! You’ve successfully authenticated, but GitHub does not provide shell access
Connection to github.com closed.