git官网下载地址：https://git-scm.com/downloads自己进去找对应的版本

git中用户名及邮箱的设定

git config --global user.name "用户名"
git config --global user.name "用户邮箱"

cd ~/.ssh`                   # 进入到~./ssh中   如果显示No such file or directory  则进行下一步   否则直接跳过下一步

mkdie ~/.ssh
cd ~/.ssh

生成RSA摘要 在git 与 GitHub 之间建立链接

$ ssh-keygen -t rsa -C "用户邮箱"                 ----这个是命令
Generating public/private rsa key pair.
Enter file in which to save the key (/c/Users/axing/.ssh/id_rsa):                    # 回车即可
Enter passphrase (empty for no passphrase):					     					 # 回车即可
Enter same passphrase again:	           					    					 # 回车即可
Your identification has been saved in /c/Users/axing/.ssh/id_rsa
Your public key has been saved in /c/Users/axing/.ssh/id_rsa.pub
The key fingerprint is:
SHA256:OU9e2+vM546g/HZ1w6t3i5yh+PtRkZhrHtxzoY+e5q8 用户邮箱
The key's randomart image is:
+---[RSA 3072]----+
|                 |
|              o .|
|             o + |
|         .  . + o|
|        S . .*.+.|
|         = .oo=o=|
|          o o=.o+|
|         ...==B=o|
|         .+**E@*=|
+----[SHA256]-----+

去GitHub中-------以下看图

上面的操作完成后，再回到Git Bash 命令框

$ ssh git@github.com        # 与github.com 建立来连接
The authenticity of host 'github.com (20.205.243.166)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'github.com' (ED25519) to the list of known hosts.
PTY allocation request failed on channel 0
Hi 用户! You've successfully authenticated, but GitHub does not provide shell access.
Connection to github.com closed.

注意上面的命令是在 ~/.ssh 中敲的，还有用户名 用户邮箱没有必要较真 瞎写点就好如果非要认真也没错。

接下来到pycharm中进行设定—见下图

打完 收工

以上仅仅为自己的实践记录，对内部理解不是很到位，欢迎交流、指正！