简单记录下过程 按官方网站提示即可

cd ~/.ssh/  
#如果没有证书 生成一个 
ssh-keygen -t rsa

[root@萨法是的 .ssh]#  ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):

▽
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:------
 root@阿萨法撒
The key's randomart image is:
+---[RSA 2048]----+
|   |
|                 |
+----[SHA256]-----+

# 测试
 ssh -T gitee.com
！成功了！

官网文档

文档地址

按文档操作 最后

ssh -T git@gitee.com

有报错 所以此处做单独记录