如何生成SSH key

Posted 2023-05-12

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　　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 "your_email@example.com"

　　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 "your_email@example.com"
　　# 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 your_email@example.com
　　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 参考技术A 一：生成KEY

在终端中输入：ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key重新建立ssh_host_dsa_key文件
以下是返回信息
Generating public/private dsa key pair.
Enter passphrase (empty for no passphrase):（直接回车）
Enter same passphrase again:
Your identification has been saved in /etc/ssh/ssh_host_dsa_key.
Your public key has been saved in /etc/ssh/ssh_host_dsa_key.pub.
The key fingerprint is:
xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx:xx root@localhost.localdomain
在终端中输入：ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key重新建立ssh_host_rsa_key文件
以下是返回信息
Generating public/private rkey pair.
Enter passphrase (empty for no passphrase):（直接回车）
Enter same passphrase again:
Your identification has been saved in /etc/ssh/ssh_host_rsa_key.
Your public key has been saved in /etc/ssh/ssh_host_dsa_rey.pub.

二
key生成在目录/etc/ssh
没有.ssh目录的话手动创建，注意，它的目录权限是700
cat ssh_host_dsa_key.pub >> /root/.ssh/authorized_keys
ssh_host_dsa_rey这个放到客户端
/etc/ssh/sshd_config配置如下
Port 22
PubkeyAuthentication yes
AuthorizedKeysFile /root/.ssh/authorized_keys
PasswordAuthentication no /*禁止密码验证登录本回答被提问者和网友采纳

如何生成SSH key及访问Github

一、检查SSH key是否存在

在终端输入：

ls -al ~/.ssh

如果没有，终端显示如下：

No such file or directory

如果已经存在，则会显示id_rsa和id_rsa.pub

二、生成新的SSH key

在终端输入：

ssh-keygen -t rsa -C "your_email@example.com"

其中your_email@example.com为你在Github注册时的邮箱

成功后终端显示如下：

Generating public/private rsa key pair.

Enter file in which to save the key (/Users/xxx/.ssh/id_rsa):

提示你保存.ssh/id_rsa的路径，这里直接enter

Created directory '/Users/xxx/.ssh'.

Enter passphrase (empty for no passphrase):

提示输入passphrase，每次与Github通信都会要求输入passphrase，以避免某些“失误”，建议输入

成功后终端显示：

Your identification has been saved in /Users/xxx/.ssh/id_rsa.

Your public key has been saved in /Users/xxx/.ssh/id_rsa.pub.

The key fingerprint is:

16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48 your_email@example.com

The key's randomart image is:（后面图形省略）

三、添加key到SSH

输入命令：