更新信息已过时,“无法获取光盘”

我的屏幕顶部有一个警告三角形。 当我点击它时,它表示我的更新信息已过时。 当我输入sudo apt-get update && sudo apt-get upgrade到终端时,我收到以下消息:

 W: Failed to fetch cdrom://Ubuntu 14.04 LTS _Trusty Tahr_ - Release i386 (20140417)/dists/trusty/main/binary-i386/Packages Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs W: Failed to fetch cdrom://Ubuntu 14.04 LTS _Trusty Tahr_ - Release i386 (20140417)/dists/trusty/restricted/binary-i386/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. 

有任何想法吗?

您的更新设置已启用您的cdrom文件。 因此,每次尝试和更新时,它会自动查找这些文件,根据定义,这些文件已过时。 只需取消选择那些cdrom选项和sudo apt-get update && sudo apt-get upgrade应该正常运行。

没有选择cdrom安装文件。