如何删除“忽略目录/etc/apt/sources.list.d/中的文件，因为它的文件扩展名无效？
从13.10升级到14.04，每次安装，更新，升级等时都会收到这些烦人的消息：
N: Ignoring file 'webupd8team-java-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'bumblebee-stable-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'steam.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'ubuntu-x-swat-x-updates-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'xorg-edgers-ppa-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'webupd8team-java-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'bumblebee-stable-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'steam.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'ubuntu-x-swat-x-updates-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension N: Ignoring file 'xorg-edgers-ppa-raring.list.disable' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension 如何修复邮件中告知的底层问题？
编辑：有时，我会在上面的消息中附加其他消息：
W: GPG error: http://www.duinsoft.nl debs Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY E18CE6625CB26B26 W: Failed to fetch http://ppa.launchpad.net/person/ppa/ubuntu/dists/karmic/main/binary-amd64/Packages 404 Not Found W: Failed to fetch http://ppa.launchpad.net/person/ppa/ubuntu/dists/karmic/main/binary-i386/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
有时，我可能会有其他人，但我再也找不到准确的信息了。
要解决您的第一个问题，请在终端中运行：
sudo rm /etc/apt/sources.list.d/*.disable
（当您禁用PPA时，旧版本的软件包管理工具会保留这些文件。删除它们非常安全）
你的第二个问题来自旧的Karmic存储库。 要找出哪个在终端中运行它：
cd /etc/apt grep -rw karmic *
一旦你知道它来自哪个存储库就很容易禁用/删除它。
也许你应该尝试这个命令：
sudo sh -c "echo 'Dir::Ignore-Files-Silently:: \"(.save|.distupgrade)$\";' > /etc/apt/apt.conf.d/99ignoresave"
我在Ubuntu MATE 15.04中遇到了类似的问题。 后
sudo sh -c "echo 'deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main' > /etc/apt/sources.list.d/pgdg.list"
和
wget --quiet -O - http://apt.postgresql.org/pub/repos/apt/ACCC4CF8.asc | sudo apt-key add -
和
sudo apt-get update
我收到了这条消息：
N: Ignoring file 'pgdg.listwget' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension
我这样解决了：
sudo mv /etc/apt/sources.list.d/pgdg.listwget /etc/apt/sources.list.d/pgdg.list
就我而言，它在/etc/apt/sources.list.d/目录中为* .save文件提供消息。 我删除了它们。 现在只有* .list文件存在。 那些警告减少了。
我们也可以像这样解决这个问题：
sudo mv /etc/apt/sources.list.d/webupd8team-java-raring.list.disable /etc/apt/sources.list.d/webupd8team-java-raring.list
这仅适用于单个文件。