标签：style blog http color io os ar sp 文件
git rm -r --cached <filename or .> git add . git commit -m ‘.gitignore is now working‘
源地址：http://stackoverflow.com/questions/1139762/ignore-files-that-have-already-been-committed-to-a-git-repository
git remove cache
原文地址：http://www.cnblogs.com/maozhige/p/4029302.html
