Невозможно удалить ppa

Я недавно добавил stormcloud ppa (ppa:jolicloud-team/ppa) к моим источникам программного обеспечения - но это, оказывается, пустой источник и каждый раз, когда я пытаюсь установить stormcloud, или обновить мою систему это дает ошибку. Например:

W: Failed to fetch http://ppa.launchpad.net/cooperjona/stormcloud/ubuntu/dists/precise/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/cooperjona/stormcloud/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.

Я не могу удалить этот ppa - я не могу, определил местоположение его в/etc/apt/sources.list, ни могу я удаленный это из командной строки. Например, когда я делаю:

sudo add-apt-repository --remove ppa:cooperjona/stormcloud

Это дает следующую ошибку.

Cannot access PPA (https://launchpad.net/api/1.0/~cooperjona/+archive/stormcloud) to get PPA information, please check your internet connection.

Когда я использовал ppa-чистку, я получил следующее - в результате которого я прервался.

$ sudo ppa-purge ppa:jolicloud-team/ppa

Updating packages lists
W: Failed to fetch http://ppa.launchpad.net/cooperjona/stormcloud/ubuntu/dists/precise/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/cooperjona/stormcloud/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.
Warning:  apt-get update failed for some reason
PPA to be removed: jolicloud-team ppa
comm: file 2 is not in sorted order
Package revert list generated:
 awesome/precise jolicloud-daemon/precise jolicloud-desktop-environment/precise 
jupiter/precise lua-lgi/precise nickel-browser/precise 
nickel-browser-l10n/precise nickel-codecs-ffmpeg-extra/precise 
nickel-codecs-ffmpeg-nonfree/precise xsettingsd/precise

Disabling jolicloud-team PPA from 
/etc/apt/sources.list.d/jolicloud-team-ppa-precise.list
Updating packages lists
W: Failed to fetch http://ppa.launchpad.net/cooperjona/stormcloud/ubuntu/dists/precise/main/binary-amd64/Packages  404  Not Found

W: Failed to fetch http://ppa.launchpad.net/cooperjona/stormcloud/ubuntu/dists/precise/main/binary-i386/Packages  404  Not Found

E: Some index files failed to download. They have been ignored, or old ones used instead.
Warning:  apt-get update failed for some reason
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Release 'precise' for 'jolicloud-daemon' was not found
E: Release 'precise' for 'jolicloud-desktop-environment' was not found
E: Release 'precise' for 'jupiter' was not found
E: Release 'precise' for 'nickel-browser' was not found
E: Release 'precise' for 'nickel-browser-l10n' was not found
E: Release 'precise' for 'nickel-codecs-ffmpeg-extra' was not found
E: Release 'precise' for 'nickel-codecs-ffmpeg-nonfree' was not found
E: Release 'precise' for 'xsettingsd' was not found
Unable to find an archive "precise" for the package "jolicloud-daemon"
Unable to find an archive "precise" for the package "jolicloud-desktop-environment"
Unable to find an archive "precise" for the package "jupiter"
Unable to find an archive "precise" for the package "nickel-browser"
Unable to find an archive "precise" for the package "nickel-browser-l10n"
Unable to find an archive "precise" for the package "nickel-codecs-ffmpeg-extra"
Unable to find an archive "precise" for the package "nickel-codecs-ffmpeg-nonfree"
Unable to find an archive "precise" for the package "xsettingsd"
Unable to find an archive "precise" for the package "jolicloud-daemon"
Unable to find an archive "precise" for the package "jolicloud-desktop-environment"
Unable to find an archive "precise" for the package "jupiter"
Unable to find an archive "precise" for the package "nickel-browser"
Unable to find an archive "precise" for the package "nickel-browser-l10n"
Unable to find an archive "precise" for the package "nickel-codecs-ffmpeg-extra"
Unable to find an archive "precise" for the package "nickel-codecs-ffmpeg-nonfree"
Unable to find an archive "precise" for the package "xsettingsd"
The following packages will be DOWNGRADED:
  awesome 
The following NEW packages will be installed:
  libev4{a} 
The following packages will be REMOVED:
  feh{u} giblib1{u} libjpeg-progs{u} libjpeg-turbo-progs{u} lua-lgi{u} 
0 packages upgraded, 1 newly installed, 1 downgraded, 5 to remove and 10 not upgraded.
Need to get 873 kB of archives. After unpacking 575 kB will be freed.
The following packages have unmet dependencies:
 jolicloud-desktop-environment : Depends: awesome (>= 3.5) but 3.4.11-1ubuntu1 is to be installed.
The following actions will resolve these dependencies:

     Remove the following packages: 
1)     jolicloud-desktop-environment



Accept this solution? [Y/n/q/?] n
The following actions will resolve these dependencies:

     Keep the following packages at their current version:                  
1)     awesome [3.5-rc1-8~precise1 (now)]                                   
2)     feh [2.2-1 (now, precise)]                                           
3)     giblib1 [1.2.4-8 (now, precise)]                                     
4)     libjpeg-turbo-progs [1.1.90+svn733-0ubuntu4.1 (now, precise-updates)]
5)     lua-lgi [0.6.2-1ubuntu1~precise1 (now)]                              



Accept this solution? [Y/n/q/?] q

Это не вредит моему компьютеру или чему-то, но на основе моих прошлых опытов, я извлек урок или два относительно дефектного ppas, и я не хочу полное нарушение обычного порядка своих пакетов.Что мне делать?

(Я использую Ubuntu 12.04 LTS),