1 生成ssh key，使用默认保存位置（注意要求输入密码时直接回车，否则每次要输密码）
[root@localhost ~]# 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:CvE7bPPDYb1EnQsGsDjs8uqUoiW2XH8g36ycVixmJBw root@localhost.localdomain
The key's randomart image is:
+---[RSA 2048]----+
| .. |
| E . .. |
| . * . . . . |
| + = + o |
| . = o S+ . . |
| = B =o o . |
|o.+.* &o o . |
|+=o.o+.Bo . |
|.+o .=o .. |
+----[SHA256]-----+
[root@localhost ~]#
2 将公钥文件/root/.ssh/id_rsa.pub上传到github
用记事本打开文件，然后拷贝内容到github
3 测试（切换为ssh方式，而不是默认的http方式）
[root@localhost boost_1_67_0]# git remote add origin git@github.com:zzpu/boost.git
[root@localhost boost_1_67_0]# git push -u origin master
原文链接：https://blog.csdn.net/idwtwt/article/details/80635238