git push本地代码到github出错

$ Git push -u origin master 
To git@github.com:**/Demo.git 
! [rejected] master -> master (non-fast-forward) 
error: failed to push some refs to ‘git@github.com:**/Demo.git’ 
hint: Updates were rejected because the tip of your current branch is behind 
hint: its remote counterpart. Merge the remote changes (e.g. ‘git pull’) 
hint: before pushing again. 
hint: See the ‘Note about fast-forwards’ in ‘git push –help’ for details.

因为远程repository和我本地的repository冲突导致的

有如下几种解决方法：

1.使用强制push的方法：

$ git push -u origin master -f

这样会使远程修改丢失，一般是不可取的，尤其是多人协作开发的时候。

2.push前先将远程repository修改pull下来

$ git pull origin master

$ git push -u origin master

3.若不想merge远程和本地修改，可以先创建新的分支：

$ git branch [name]

然后push

$ git push -u origin [name]