我在 Linux Mint 18 KDE 版本上尝试更新一些驱动程序、控制器（它讨论了从存储库下载一些数据的方法）时总是遇到错误，我该如何修复它？
W:The repository 'cdrom://Linux Mint 18 _Sarah_ - Release amd64 20160904 xenial Release' does not have a Release file.
W:Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
W:See apt-secure(8) manpage for repository creation and user configuration details.
E:Failed to fetch cdrom://Linux Mint 18 _Sarah_ - Release amd64 20160904/dists/xenial/contrib/binary-amd64/Packages
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
E:Some index files failed to download. They have been ignored, or old ones used instead.
更新：
我也厌倦了收到一条消息说“检查你的互联网连接”，正如你所看到的，我已经连线了......
