To untrack a single file that has already been added/initialized to your repository, ie , stop tracking the file but not delete it from your system use: git rm --cached filename
(要取消跟踪已添加/初始化到存储库中的单个文件， 即停止跟踪文件但不将其从系统中删除，请使用： git rm --cached filename)
To untrack every file that is now in your .gitignore :
(取消跟踪.gitignore现在的每个文件：)
First commit any outstanding code changes , and then, run this command:
(首先提交所有未完成的代码更改 ，然后运行以下命令：)
git rm -r --cached .
This removes any changed files from the index (staging area), then just run:
(这将从索引 （临时区域）中删除所有更改的文件，然后运行：)
git add .
Commit it:
(提交：)
git commit -m ".gitignore is now working"
To undo git rm --cached filename , use git add filename .
(要撤消git rm --cached filename ，请使用git add filename 。)
Make sure to commit all your important changes before running git add .
(确保在运行git add .之前提交所有重要更改git add .)
Otherwise, you will lose any changes to other files. (否则，您将丢失对其他文件的任何更改。)
与恶龙缠斗过久,自身亦成为恶龙；凝视深渊过久,深渊将回以凝视…
