新建本地一个仓库，提交到github失败，原因是远程仓库的README.md等文件在push之前，没有 pull下来，导致 github中的远程文件不在本地代码目录中
报错信息类似如下：
git push -u origin master
To github.com:Houttuyniae/notes.git
! [rejected] master -> master (non-fast-forward)
error: failed to push some refs to 'git@github.com:Houttuyniae/notes.git'
hint: Updates were rejected because the tip of your current branch is behind
hint: its remote counterpart. Integrate the remote changes (e.g.
hint: 'git pull ...') before pushing again.
hint: See the 'Note about fast-forwards' in 'git push --help' for details.
需要先执行 git pull --rebase origin master 把 本地缺失的README.md等文件下载下来
git pull --rebase origin master
From github.com:Houttuyniae/notes
* branch master -> FETCH_HEAD
First, rewinding head to replay your work on top of it...
如果在pull之前，又执行了commit，则会报错
git pull --rebase origin master
error: cannot pull with rebase: You have unstaged changes.
error: additionally, your index contains uncommitted changes.
error: please commit or stash them.
需要先执行 git stash 缓存一下 最后在 push
git push -u origin master
Counting objects: 5, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (5/5), done.
Writing objects: 100% (5/5), 590 bytes | 590.00 KiB/s, done.
Total 5 (delta 3), reused 0 (delta 0)
remote: Resolving deltas: 100% (3/3), completed with 3 local objects.
To github.com:Houttuyniae/notes.git
d81c6a9..929dc11 master -> master
Branch 'master' set up to track remote branch 'master' from 'origin'.
