如题，我本地有一个_posts文件夹，但是我做了一些修改后再push到github上却看不到这个文件夹了，请问这是怎么回事，应该如何修复呢？

git status 的输出如下：On branch gh-pages

 Your branch is up-to-date with 'origin/gh-pages'.

nothing to commit, working directory clean

然后操作

 git add _posts
   git status

输出：

 On branch gh-pages
  Your branch is up-to-date with 'origin/gh-pages'.nothing to commit,             working directory clean

git commit -a 的输出

 On branch gh-pages
Your branch is up-to-date with 'origin/gh-pages'.
nothing to commit, working directory clean

执行 git rm -r _posts 后有如下输出：

 fatal: pathspec '_posts' did not match any files