添加并删除ppa:graphics-drivers/dev失败，原因是
> sudo add-apt-repository ppa:graphics-drivers/dev
More info: https://launchpad.net/~graphics-drivers/+archive/ubuntu/dev
Press [ENTER] to continue or Ctrl-c to cancel adding it.
Hit:1 http://repo.steampowered.com/steam precise InRelease
Hit:2 http://repository.spotify.com stable InRelease
Hit:3 https://download.virtualbox.org/virtualbox/debian cosmic InRelease
Hit:4 http://de.archive.ubuntu.com/ubuntu cosmic InRelease
Hit:5 http://deb.playonlinux.com cosmic InRelease
Hit:6 http://ppa.launchpad.net/commendsarnex/winedri3/ubuntu cosmic InRelease
Hit:7 http://de.archive.ubuntu.com/ubuntu cosmic-security InRelease
Hit:8 http://de.archive.ubuntu.com/ubuntu cosmic-updates InRelease
Get:9 http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic InRelease [21,3 kB]
Hit:10 http://de.archive.ubuntu.com/ubuntu cosmic-backports InRelease
Hit:11 https://dl.winehq.org/wine-builds/ubuntu cosmic InRelease
Hit:12 https://download.docker.com/linux/ubuntu cosmic InRelease
Hit:13 http://ppa.launchpad.net/oibaf/graphics-drivers/ubuntu cosmic InRelease
Hit:14 http://ppa.launchpad.net/wfg/0ad.dev/ubuntu cosmic InRelease
Hit:15 http://ppa.launchpad.net/xorg-edgers/ppa/ubuntu cosmic InRelease
Hit:16 https://packages.gitlab.com/runner/gitlab-runner/ubuntu bionic InRelease
Get:17 http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic/main amd64 Packages [4.100 B]
Get:18 http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic/main i386 Packages [2.544 B]
Get:19 http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic/main Translation-en [2.144 B]
Fetched 30,1 kB in 4s (7.730 B/s)
Reading package lists... Done
r> sudo ppa-purge ppa:graphics-drivers/dev
Updating packages lists
PPA to be removed: graphics-drivers dev
Package revert list generated:
install-
Disabling graphics-drivers PPA from
/etc/apt/sources.list.d/graphics-drivers-ubuntu-dev-cosmic.list
Updating packages lists
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package install
Couldn't find any package whose name is "install", but there are 154 packages which contain "install" in their name:
(too many to show, the limit is 40)
Unable to apply some actions, aborting
Warning: Something went wrong, packages may not have been reverted
我正在寻找一个修复程序，以便ppa-purge完成自动降级程序或联系 PPA 提供商，以便我可以将这个问题告知他们。
评论中要求的信息：
> cat /etc/apt/sources.list.d/graphics-drivers-ubuntu-dev-cosmic.list
deb http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
# deb-src http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
# deb-src http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
# deb-src http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
# deb-src http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
> cat /etc/apt/sources.list.d/graphics-drivers-ubuntu-dev-cosmic.list.save
# deb http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
# deb-src http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
# deb-src http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
# deb-src http://ppa.launchpad.net/graphics-drivers/dev/ubuntu cosmic main
和
> apt-cache policy ppa-purge
ppa-purge:
Installed: 0.2.8+bzr63
Candidate: 0.2.8+bzr63
Version table:
*** 0.2.8+bzr63 500
500 http://de.archive.ubuntu.com/ubuntu cosmic/universe amd64 Packages
500 http://de.archive.ubuntu.com/ubuntu cosmic/universe i386 Packages
100 /var/lib/dpkg/status
也
> aptitude search '~O LP-PPA ?installed'
i 0ad - Echtzeit-Strategiespiel für antike Kriegsführung
i A 0ad-data - Echtzeit-Strategiespiel über antike Kriegsführung (Datendateien)
i A 0ad-data-common - Echtzeit-Strategiespiel für antike Kriegsführung (Gemeinsame Dateien)
i A libclang-common-7-dev - clang library - Common development package
i A libclang1-7 - C interface to the clang library
i A libclc-amdgcn - OpenCL C language implementation - amdgcn support
i A libclc-dev - OpenCL C language implementation - development files
i A libclc-r600 - OpenCL C language implementation - r600 support
i A libd3dadapter9-mesa - state-tracker for Direct3D9
i libd3dadapter9-mesa-dev - state-tracker for Direct3D9 -- development files
i libdrm-amdgpu1 - Userspace interface to amdgpu-specific kernel DRM services -- runtime
i libdrm-amdgpu1:i386 - Userspace interface to amdgpu-specific kernel DRM services -- runtime
i libdrm-common - Userspace interface to kernel DRM services -- common files
i libdrm-dev - User-Space-Schnittstelle zu Kernel-DRM-Diensten -- Entwicklungsdateien
i libdrm-dev:i386 - User-Space-Schnittstelle zu Kernel-DRM-Diensten -- Entwicklungsdateien
i libdrm-intel1 - Benutzerbereichsschnittstelle zu Intel-spezifischen Kernel-DRM-Diensten – Laufzeit
i libdrm-intel1:i386 - Benutzerbereichsschnittstelle zu Intel-spezifischen Kernel-DRM-Diensten – Laufzeit
i libdrm-nouveau2 - Benutzerbereichsschnittstelle zu nouveau-spezifischen Kernel-DRM-Diensten – Laufzeit
i libdrm-nouveau2:i386 - Benutzerbereichsschnittstelle zu nouveau-spezifischen Kernel-DRM-Diensten – Laufzeit
i libdrm-radeon1 - Benutzerbereichsschnittstelle zu Radeon-spezifischen Kernel-DRM-Diensten – Laufzeit
i libdrm-radeon1:i386 - Benutzerbereichsschnittstelle zu Radeon-spezifischen Kernel-DRM-Diensten – Laufzeit
i libdrm2 - Benutzerbereichsschnittstelle zu den Kernel-DRM-Diensten – Laufzeit
i libdrm2:i386 - Benutzerbereichsschnittstelle zu den Kernel-DRM-Diensten – Laufzeit
i A libegl-mesa0 - free implementation of the EGL API -- Mesa vendor library
i A libegl-mesa0:i386 - free implementation of the EGL API -- Mesa vendor library
i libegl1-mesa - transitional dummy package
i libegl1-mesa-dev - Freie Implementierung der EGL-API -- Entwicklungsdateien
i libgbm-dev - API für generische Pufferverwaltung -- Entwicklungsdateien
i libgbm1 - API für generische Pufferverwaltung -- Laufzeit
i libgbm1:i386 - API für generische Pufferverwaltung -- Laufzeit
i libgl1-mesa-dev - free implementation of the OpenGL API -- GLX development files
i libgl1-mesa-dev:i386 - free implementation of the OpenGL API -- GLX development files
i libgl1-mesa-dri - free implementation of the OpenGL API -- DRI modules
i libgl1-mesa-dri:i386 - free implementation of the OpenGL API -- DRI modules
i libgl1-mesa-glx - transitional dummy package
i libgl1-mesa-glx:i386 - transitional dummy package
i libglapi-mesa - Freie Implementierung der GL-API - Laufzeitbibliothek
i libglapi-mesa:i386 - Freie Implementierung der GL-API - Laufzeitbibliothek
i libgles2-mesa - transitional dummy package
i libgles2-mesa-dev - free implementation of the OpenGL|ES 2.x API -- development files
i A libglx-mesa0 - free implementation of the OpenGL API -- GLX vendor library
i A libglx-mesa0:i386 - free implementation of the OpenGL API -- GLX vendor library
i A libllvm7 - Modular compiler and toolchain technologies, runtime library
i A libllvm7:i386 - Modular compiler and toolchain technologies, runtime library
i libosmesa6 - Mesa Off-screen rendering extension
i libosmesa6:i386 - Mesa Off-screen rendering extension
i libosmesa6-dev - Mesa Off-screen rendering extension -- development files
i libwayland-egl1-mesa - transitional dummy package
i libxatracker2 - X acceleration library -- runtime
i llvm-7 - Modular compiler and toolchain technologies
i A llvm-7-runtime - Modular compiler and toolchain technologies, IR interpreter
i mesa-common-dev - Entwicklerdokumentation für Mesa
i mesa-common-dev:i386 - Entwicklerdokumentation für Mesa
i mesa-opencl-icd - free implementation of the OpenCL API -- ICD runtime
i mesa-va-drivers - Mesa VA-API video acceleration drivers
i mesa-va-drivers:i386 - Mesa VA-API video acceleration drivers
i mesa-vdpau-drivers - Mesa VDPAU video acceleration drivers
i A mesa-vdpau-drivers:i386 - Mesa VDPAU video acceleration drivers
i mesa-vulkan-drivers - Mesa Vulkan graphics drivers