git clone出现fatal: Could not read from remote repository解决办法

一、问题描述

在git clone一个项目时出现如下报错：
（第一个选项，问你是否继续连接？输入yes然后回车）

The authenticity of host 'github.com (20.205.243.166)' can't be established.
ECDSA key fingerprint is SHA256:p2QAMXNIC1TJYWeIOttrVc98/R1BUFWu3/LiyKgUfQM.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'github.com,20.205.243.166' (ECDSA) to the list of known hosts.
[email protected]: Permission denied (publickey).
fatal: Could not read from remote repository.

通过报错信息可以看出，这是因为Github上没有本机的公钥导致的。

二、解决办法

1、在终端输入

ssh-keygen -t rsa -C "[email protected]"

其中双引号中填自己Github注册账号用的邮箱地址。
点击回车，看到提示

Generating public/private rsa key pair.
Enter file in which to save the key (/home/yichen/.ssh/id_rsa): 
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/yichen/.ssh/id_rsa
Your public key has been saved in /home/yichen/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:KfhnvKTaASEb6Efb0LKofhCnu6rLgBX72FC3gRykSQU [email protected]
The key's randomart image is:
+---[RSA 3072]----+
|  E++            |
| o +.o           |
|. *+=.o          |
|..oO*+ o .       |
| oO+o.o S        |
|o+.= o o         |
|+ + o o =        |
|+. . . * .       |
|*=o ..o .        |
+----[SHA256]-----+

说明：前三个冒号分别让你输入保存公钥的文件、一次性密钥和密钥确认，可以直接回车，他会默认创建密钥文件到指定路径下。看到如上图所示的乱码，说明公钥创建完成。

2、到路径下查看

我的路径是/home/yichen/.ssh/id_rsa.pub，（注意是后缀为.pub的文件，而不是id_rsa）
cat 显示文件内容，

cat /home/yichen/.ssh/id_rsa.pub

文件形式为

ssh-rsa 后面一堆字符

复制文件里的全部内容（包括前缀ssh-rsa）。

3、打开GitHub

点击右上角自己头像，打开下拉菜单，选择设置Settings

左边找到SSH和PGP密钥，点击new SSH Key，将之前复制的内容粘贴到里面，就行了。
Title栏可以不填，密钥类型选择Authentication Key。

然后GitHub让你确认登录，确认登录后就大功告成，可以正常Git Clone了。