我知道存在同样的问题，但我认为这个问题没有答案。我必须清除一些 ppa，我尝试使用ppa-purge以下命令：
sudo ppa-purge ppa:<ppa_name>/ppa
但是 ?? 是什么ppa_name？我有这个（坏的）sources.list.d
danielrichter2007-grub-customizer-precise.list google-chrome.list.save n-muench-vlc-precise.list videolan-stable-daily-precise.list.save
danielrichter2007-grub-customizer-precise.list.save jockey.list n-muench-vlc-precise.list.save webupd8team-unstable-precise.list
dropbox.list jockey.list.save relan-exfat-precise.list webupd8team-unstable-precise.list.save
dropbox.list.save langdalepl-gvfs-mtp-precise.list relan-exfat-precise.list.save wine-wine-builds-precise.list
freefilesync-ffs-precise.list langdalepl-gvfs-mtp-precise.list.save thefanclub-grive-tools-precise.list wine-wine-builds-precise.list.save
freefilesync-ffs-precise.list.save lubuntu-dev-lubuntu-daily-precise.list thefanclub-grive-tools-precise.list.save
google-chrome.list lubuntu-dev-lubuntu-daily-precise.list.save videolan-stable-daily-precise.list
但我不知道名字，例如：
sudo ppa-purge ppa:lubuntu/ppa
Updating packages lists
PPA to be removed: lubuntu ppa
Warning: Could not find package list for PPA: lubuntu ppa
编辑
/etc/apt/sources.list.d$ grep ppa /etc/apt/sources.list /etc/apt/sources.list.d/*
/etc/apt/sources.list:deb http://ppa.launchpad.net/tualatrix/ppa/ubuntu precise main
/etc/apt/sources.list:deb-src http://ppa.launchpad.net/tualatrix/ppa/ubuntu precise main
/etc/apt/sources.list.d/danielrichter2007-grub-customizer-precise.list:# deb http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu precise main
/etc/apt/sources.list.d/danielrichter2007-grub-customizer-precise.list:# deb-src http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu precise main
/etc/apt/sources.list.d/danielrichter2007-grub-customizer-precise.list.save:# deb http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu precise main
/etc/apt/sources.list.d/danielrichter2007-grub-customizer-precise.list.save:# deb-src http://ppa.launchpad.net/danielrichter2007/grub-customizer/ubuntu precise main
/etc/apt/sources.list.d/freefilesync-ffs-precise.list:deb http://ppa.launchpad.net/freefilesync/ffs/ubuntu precise main
/etc/apt/sources.list.d/freefilesync-ffs-precise.list:deb-src http://ppa.launchpad.net/freefilesync/ffs/ubuntu precise main
/etc/apt/sources.list.d/freefilesync-ffs-precise.list.save:deb http://ppa.launchpad.net/freefilesync/ffs/ubuntu precise main
/etc/apt/sources.list.d/freefilesync-ffs-precise.list.save:deb-src http://ppa.launchpad.net/freefilesync/ffs/ubuntu precise main
/etc/apt/sources.list.d/langdalepl-gvfs-mtp-precise.list:deb http://ppa.launchpad.net/langdalepl/gvfs-mtp/ubuntu precise main
/etc/apt/sources.list.d/langdalepl-gvfs-mtp-precise.list:deb-src http://ppa.launchpad.net/langdalepl/gvfs-mtp/ubuntu precise main
/etc/apt/sources.list.d/langdalepl-gvfs-mtp-precise.list.save:deb http://ppa.launchpad.net/langdalepl/gvfs-mtp/ubuntu precise main
/etc/apt/sources.list.d/langdalepl-gvfs-mtp-precise.list.save:deb-src http://ppa.launchpad.net/langdalepl/gvfs-mtp/ubuntu precise main
/etc/apt/sources.list.d/lubuntu-dev-lubuntu-daily-precise.list.save:deb-src http://ppa.launchpad.net/lubuntu-dev/lubuntu-daily/ubuntu precise main
/etc/apt/sources.list.d/n-muench-vlc-precise.list:deb http://ppa.launchpad.net/n-muench/vlc/ubuntu precise main
/etc/apt/sources.list.d/n-muench-vlc-precise.list:deb-src http://ppa.launchpad.net/n-muench/vlc/ubuntu precise main
/etc/apt/sources.list.d/n-muench-vlc-precise.list.save:deb http://ppa.launchpad.net/n-muench/vlc/ubuntu precise main
/etc/apt/sources.list.d/n-muench-vlc-precise.list.save:deb-src http://ppa.launchpad.net/n-muench/vlc/ubuntu precise main
/etc/apt/sources.list.d/relan-exfat-precise.list:# deb http://ppa.launchpad.net/relan/exfat/ubuntu precise main
/etc/apt/sources.list.d/relan-exfat-precise.list:# deb-src http://ppa.launchpad.net/relan/exfat/ubuntu precise main
/etc/apt/sources.list.d/relan-exfat-precise.list.save:# deb http://ppa.launchpad.net/relan/exfat/ubuntu precise main
/etc/apt/sources.list.d/relan-exfat-precise.list.save:# deb-src http://ppa.launchpad.net/relan/exfat/ubuntu precise main
/etc/apt/sources.list.d/thefanclub-grive-tools-precise.list:# deb http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu precise main
/etc/apt/sources.list.d/thefanclub-grive-tools-precise.list:# deb-src http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu precise main
/etc/apt/sources.list.d/thefanclub-grive-tools-precise.list.save:# deb http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu precise main
/etc/apt/sources.list.d/thefanclub-grive-tools-precise.list.save:# deb-src http://ppa.launchpad.net/thefanclub/grive-tools/ubuntu precise main
/etc/apt/sources.list.d/videolan-stable-daily-precise.list:deb http://ppa.launchpad.net/videolan/stable-daily/ubuntu precise main
/etc/apt/sources.list.d/videolan-stable-daily-precise.list:deb-src http://ppa.launchpad.net/videolan/stable-daily/ubuntu precise main
/etc/apt/sources.list.d/videolan-stable-daily-precise.list.save:deb http://ppa.launchpad.net/videolan/stable-daily/ubuntu precise main
/etc/apt/sources.list.d/videolan-stable-daily-precise.list.save:deb-src http://ppa.launchpad.net/videolan/stable-daily/ubuntu precise main
/etc/apt/sources.list.d/webupd8team-unstable-precise.list:deb http://ppa.launchpad.net/webupd8team/unstable/ubuntu precise main
/etc/apt/sources.list.d/webupd8team-unstable-precise.list:deb-src http://ppa.launchpad.net/webupd8team/unstable/ubuntu precise main
/etc/apt/sources.list.d/webupd8team-unstable-precise.list.save:deb http://ppa.launchpad.net/webupd8team/unstable/ubuntu precise main
/etc/apt/sources.list.d/webupd8team-unstable-precise.list.save:deb-src http://ppa.launchpad.net/webupd8team/unstable/ubuntu precise main
/etc/apt/sources.list.d/wine-wine-builds-precise.list:deb http://ppa.launchpad.net/wine/wine-builds/ubuntu precise main
/etc/apt/sources.list.d/wine-wine-builds-precise.list:deb-src http://ppa.launchpad.net/wine/wine-builds/ubuntu precise main
/etc/apt/sources.list.d/wine-wine-builds-precise.list.save:deb http://ppa.launchpad.net/wine/wine-builds/ubuntu precise main
/etc/apt/sources.list.d/wine-wine-builds-precise.list.save:deb-src http://ppa.launchpad.net/wine/wine-builds/ubuntu precise main
答案1
您需要查看列表文件。在许多发行版中，它位于 下/etc/apt/sources.list.d/。
例如，我有一个 java ppa。列表是webupd8team-java-trusty.list。
它包含了：
deb http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main
# deb-src http://ppa.launchpad.net/webupd8team/java/ubuntu trusty main
因此ppa-purge命令看起来如下：
sudo ppa-purge ppa:webupd8team/java
对于您的“lubuntu”ppa，命令是：
sudo ppa-purge ppa:lubuntu-dev/lubuntu-daily
位于发行版名称<ppa-name>之后和之前。http://ppa.launchpad.net/
如果仍然出现错误，则说明您的列表已损坏。您可以随时添加 PPA 然后清除它，例如：
sudo add-apt-repository ppa:lubuntu-dev/lubuntu-daily
sudo apt-get update
sudo ppa-purge ppa:lubuntu-dev/lubuntu-daily