git默认push需要填写账号密码才能成功，通过配置账号和ssh可以实现直接推送，节省时间。步骤如下:
1. 打开.git/config,找到[remote "origin"]栏下的url，将https认证改成git认证，格式如下
[email protected]:xxx/learngit.git
xxx是账号
2打开家目录下.ssh目录，如果存在id.rsa,id.rsa.pub,表示已有密钥生成，如果不用可直接删除，重新生成。
ssh-keygen -t rsa -b 4096 -C "xxx"，一路回车
ssh-add ~/.ssh/id_rsa
3 打开id_rsa.pub，复制公钥信息，打开github的setting页，ssh gpg keys选项，点击new ssh key，粘贴公钥信息，输入名称，如cloud-key，点击提交。
测试方法，执行命令
git push -u origin master
结果如下:
Counting objects: 4, done.
Compressing objects: 100% (3/3), done.
Writing objects: 100% (4/4), 424 bytes | 0 bytes/s, done.
Total 4 (delta 1), reused 0 (delta 0)
remote: Resolving deltas: 100% (1/1), completed with 1 local object.
To [email protected]:xxx/learngit.git
b877021..8c0d0f4 master -> master
Branch master set up to track remote branch master from origin.