本来也是空的，来留档
https://blog.csdn.net/qq_19004627/article/details/79639135这里是教程的说，感谢大佬。
jane@janee:~$ git config --global user.name "xtwentian3"
jane@janee:~$ git config --global user.email "tianerhainv@163.com"
jane@janee:~$ git config --list
user.name=xtwentian3
user.email=tianerhainv@163.com
jane@janee:~$ ssh-keygen -C "tianerhainv@163.com" -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/jane/.ssh/id_rsa): /home/jane/programe/.ssh/id_rsa
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Saving key "/home/jane/programe/.ssh/id_rsa" failed: No such file or directory
jane@janee:~$ ssh-keygen -C "tianerhainv@163.com" -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/jane/.ssh/id_rsa): /home/jane/programe/.ssh/id_rsa
/home/jane/programe/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Saving key "/home/jane/programe/.ssh/id_rsa" failed: passphrase is too short (minimum five characters)
jane@janee:~$ ssh-keygen -C "tianerhainv@163.com" -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/jane/.ssh/id_rsa): /home/jane/programe/.ssh/id_rsa
/home/jane/programe/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Saving key "/home/jane/programe/.ssh/id_rsa" failed: Is a directory
jane@janee:~$ ssh-keygen -C "tianerhainv@163.com" -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/jane/.ssh/id_rsa): /home/jane/programe/.ssh/id_rsa
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/jane/programe/.ssh/id_rsa.
Your public key has been saved in /home/jane/programe/.ssh/id_rsa.pub.
The key fingerprint is:
SHA256:UkrBKoNdnZBamKFY1i04hOSSnyAoXl/4v99RmaySWCU tianerhainv@163.com
The key‘s randomart image is:
+---[RSA 2048]----+
|.+=*.*.. |
|=== * *. |
|X+ * +... E . |
|*o*.o.oo o . o|
| .oo .o.S . = |
| .. o . o |
| o o o |
| . o . |
| ... . |
+----[SHA256]-----+
jane@janee:~$ cd ~/programe/.ssh
jane@janee:~/programe/.ssh$ ls
id_rsa id_rsa.pub
jane@janee:~/programe/.ssh$ ssh-add ~/programe/.ssh/id_dsa
/home/jane/programe/.ssh/id_dsa: No such file or directory
jane@janee:~/programe/.ssh$ ssh-add ~/programe/.ssh/id_rsa
Identity added: /home/jane/programe/.ssh/id_rsa (/home/jane/programe/.ssh/id_rsa)
jane@janee:~/programe/.ssh$ cat id_rsa.pub
ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCYz09Mdj4VpZG+CnQrNvK/eF8EoQw4g229e8WuBywYXh9VuHNFjLr9Pb2a/pUWU96zqyNOBNaCNsd7f9/R7LdWv8iK4yEREcmG/G5051p12Bd4HUtm5HUultZsxNm8aThJnwHXFho3EDsGCPfIFmqPG4VHrSasFbJjqIDlDNMmIvEbrPmcKtV7Fq8JfFc1VCQ44GVhf8d0imKYumq5QTJEkPcsc4aM5ma1NCvFv4VMZnsx2I1XzX8FOskAa/D1lX2NYXY5IJxzO0jLvIAKSF/0z/8/6wswBMrzQY4ZQR7GN6hJXX/6hkJ/5d5PHI1XRd5eWzVNr2J7Gb1HWXl1guVx tianerhainv@163.com
jane@janee:~/programe/.ssh$ ssh -T git@github.com
Warning: Permanently added the RSA host key for IP address ‘13.250.177.223‘ to the list of known hosts.
Hi xtwentian3! You‘ve successfully authenticated, but GitHub does not provide shell access.
原文：https://www.cnblogs.com/Leeny/p/12635836.html