Git push 失败原因总结

hint: Updates were rejected because the remote contains work that you do
hint: not have locally. This is usually caused by another repository pushing
hint: to the same ref. You may want to first integrate the remote changes
hint: (e.g., 'git pull ...') before pushing again.

hint: See the 'Note about fast-forwards' in 'git push --help' for details.

在git push 是提示的错误，然后解决了

有时候往GitHub上提交东西的时候会因为remote repository上有东西更新了但是local 

repository 没有更新而造成提交失败，此时需要git pull origin master,这样就会出现一个小黑框

要求你输入为何要merge两者:press "i"->write your merge message->press "esc"->write 

":wq"->then press enter,就可以继续回到输入命令的小黑框界面了。