步骤一：Git 的数据库中删除对于该文件的追踪     【 git rm -r --cached .】

步骤二：对应的规则写入.gitignore，让忽略真正生效   【 git add . 】

步骤三：提交＋推送  【git commit -m "update .gitignore"】

1：$ git rm -r --cached .

rm '.gitattributes'

rm '.gitignore'

rm 'GameBiz.AutoRunner.Test/App.config'

rm 'GameBiz.AutoRunner.Test/GameBiz.AutoRunner.Test.csproj'

rm 'GameBiz.AutoRunner.Test/Properties/AssemblyInfo.cs'

rm 'GameBiz.AutoRunner.Test/UnitTest1.cs'

rm 'GameBiz.AutoRunner.sln'

rm 'GameBiz.AutoRunner.vsmdi'

2：$ git add .

3：$ git commit -m "update .gitignore"

[VN 14d740e] update .gitignore

11 files changed, 63 deletions(-)

delete mode 100644 Outputs/Common.Lottery.dll

delete mode 100644 Outputs/Common.dll

delete mode 100644 Outputs/External.Client.dll

delete mode 100644 Outputs/External.Core.dll

delete mode 100644 Outputs/GameBiz.AutoRunner.dll

delete mode 100644 Outputs/GameBiz.Client.dll

delete mode 100644 Outputs/GameBiz.Core.dll

delete mode 100644 Outputs/WinServices.Services.exe

delete mode 100644 Outputs/WinServices.Services.exe.config

delete mode 100644 Outputs/WinServices.Setup.exe

delete mode 100644 Outputs/install.bat

原因是: 当 .gitignore 文件配置好后，往往不能失效。这是因为 .gitignore 只能忽略那些没有被追踪(track)的文件，因为 git 存在本地缓存，如果文件已经纳入了版本管理，那么修改 .gitignore 是不能失效的。那么解决方案就是要将 git 的本地缓存删除，然后重新提交。

参考地址：https://cloud.tencent.com/developer/article/2217197