1.从远程仓库clone到本地

2.生成SSH秘钥，为push做准备

在Ubuntu命令行输入一下内容

[root@localhost ~]# ssh-keygen -t rsa       <== 建立密钥对，-t代表类型，有RSA和DSA两种
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):   <==密钥文件默认存放位置，按Enter即可
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase):     <== 输入密钥锁码，或直接按 Enter 留空
Enter same passphrase again:     <== 再输入一遍密钥锁码
Your identification has been saved in /root/.ssh/id_rsa.    <== 生成的私钥
Your public key has been saved in /root/.ssh/id_rsa.pub.    <== 生成的公钥
The key fingerprint is:
SHA256:K1qy928tkk1FUuzQtlZK+poeS67vIgPvHw9lQ+KNuZ4 root@localhost.localdomain
The key's randomart image is:
+---[RSA 2048]----+
|           +.    |
|          o * .  |
|        . .O +   |
|       . *. *    |
|        S =+     |
|    .    =...    |
|    .oo =+o+     |
|     ==o+B*o.    |
|    oo.=EXO.     |
+----[SHA256]-----+

最后生产SSH Key的秘钥对， id_rsa 是私钥，不能泄露出去， id_rsa.pub 是公钥，可以放心地告诉任何人。
按这个目录去.ssh目录下找到id_rsa.pub这个文件夹打开复制全部内容。

在github上面添加公钥将上面内容复制到下图位置

输入ssh -T git@github.com，查看SSH公钥密钥是否配置成功，出现下面信息表明成功

3.将更新了的本地仓库push到远程仓库

第一次push时需要先链接远程仓库

后面提交只要输入下面四句命令即可