软件更新失败

Question

 Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/main/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

W: Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/restricted/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

W: Failed to fetch cdrom://Ubuntu 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/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 12.10 _Quantal Quetzal_ - Release amd64 (20121017.5)/dists/quantal/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.

这是我尝试更新软件时最后得到的结果

Answer 1

打开更新管理器并点击设置。然后会打开一个窗口。在该窗口的第一个选项卡中，您将找到 CD-ROM 选项。取消选中它。

我正在使用 12.04，这就是为什么那里有 12.04，但对你来说它将是 12.10。取消选中它并重试。

方法2：CTRL使用++ 打开终端ALT，T然后输入

sudo nano /etc/apt/sources.list

在该文件中，将 # 放置在您看到 CD-ROM 行的位置。

例如：