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PPAの使用時またはパッケージリストの更新時の403 Forbidden Errorの修正方法を教えてください。

Sudo apt-get updateを使用するたびに、このエラーが表示されます。

Hit http://ppa.launchpad.net trusty/main AMD64 Packages                     
Hit http://ppa.launchpad.net trusty/main i386 Packages                  
Hit http://ppa.launchpad.net trusty/main Translation-en                 
Hit http://ppa.launchpad.net trusty Release.gpg                               
Ign http://ppa.launchpad.net trusty Release          
Ign http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release
Hit http://ppa.launchpad.net trusty Release                                 
Ign http://ppa.launchpad.net trusty/main AMD64 Packages/DiffIndex           
Ign http://ppa.launchpad.net trusty/main i386 Packages/DiffIndex               
Hit http://ppa.launchpad.net trusty/main AMD64 Packages                        
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://ppa.launchpad.net trusty/main AMD64 Packages                        
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Err http://ppa.launchpad.net trusty/main Sources                               
  403  Forbidden
Ign http://ppa.launchpad.net trusty/main Translation-en_US
Ign http://ppa.launchpad.net trusty/main Translation-en
Err http://ppa.launchpad.net trusty/main Sources
  403  Forbidden
Err http://ppa.launchpad.net trusty/main AMD64 Packages
  403  Forbidden
Err http://ppa.launchpad.net trusty/main i386 Packages
  403  Forbidden
Ign http://ppa.launchpad.net trusty/main Translation-en_US
Ign http://ppa.launchpad.net trusty/main Translation-en
Ign http://ppa.launchpad.net trusty/main Translation-en_US
Ign http://ppa.launchpad.net trusty/main Translation-en
Ign http://ppa.launchpad.net trusty/main Translation-en_US
Ign http://ppa.launchpad.net trusty/main Translation-en
Err http://ppa.launchpad.net trusty/main AMD64 Packages
  403  Forbidden
Err http://ppa.launchpad.net trusty/main i386 Packages
  403  Forbidden
W: Failed to fetch http://ppa.launchpad.net/beineri/opt-qt57-trusty/ubuntu/dists/trusty/main/source/Sources  403  Forbidden

W: Failed to fetch http://ppa.launchpad.net/beineri/opt-qt57-xenial/ubuntu/dists/trusty/main/source/Sources  403  Forbidden

W: Failed to fetch http://ppa.launchpad.net/beineri/opt-qt57-xenial/ubuntu/dists/trusty/main/binary-AMD64/Packages  403  Forbidden

W: Failed to fetch http://ppa.launchpad.net/beineri/opt-qt57-xenial/ubuntu/dists/trusty/main/binary-i386/Packages  403  Forbidden

W: Failed to fetch http://ppa.launchpad.net/beineri/opt-qt57-trusty/ubuntu/dists/trusty/main/binary-AMD64/Packages  403  Forbidden

W: Failed to fetch http://ppa.launchpad.net/beineri/opt-qt57-trusty/ubuntu/dists/trusty/main/binary-i386/Packages  403  Forbidden

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

================================================== ============================これは私のsources.listです

# deb cdrom:[Ubuntu 14.04.4 LTS _Trusty Tahr_ - Release AMD64 (20160217.1)]/ trusty main restricted

# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http://us.archive.ubuntu.com/ubuntu/ trusty main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ trusty universe
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty universe
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates universe
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates universe

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu 
## team, and may not be under a free licence. Please satisfy yourself as to 
## your rights to use the software. Also, please note that software in 
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.
deb http://us.archive.ubuntu.com/ubuntu/ trusty multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty multiverse
deb http://us.archive.ubuntu.com/ubuntu/ trusty-updates multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-updates multiverse

## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
deb http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse

deb http://us.archive.ubuntu.com/ubuntu/ trusty-security main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-security main restricted
deb http://us.archive.ubuntu.com/ubuntu/ trusty-security universe
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-security universe
deb http://us.archive.ubuntu.com/ubuntu/ trusty-security multiverse
deb-src http://us.archive.ubuntu.com/ubuntu/ trusty-security multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.
# deb http://archive.canonical.com/ubuntu trusty partner
# deb-src http://archive.canonical.com/ubuntu trusty partner

## This software is not part of Ubuntu, but is offered by third-party
## developers who want to ship their latest software.
deb http://extras.ubuntu.com/ubuntu trusty main
deb-src http://extras.ubuntu.com/ubuntu trusty main
deb http://us.archive.ubuntu.com/ubuntu/ trusty-proposed main universe multiverse restricted


## Update for Codeblock by Chunting
# deb http://apt.tt-solutions.com/ubuntu/
# deb http://apt.tt-solutions.com/ubuntu/

どうすれば修正できますか？ OSをUbunt 14.04から16.04にアップグレードしたいので

aptpackage-managementupdatessoftware-centerupdate-manager
2
Chunting Jiao

解決策は簡単だと思います-存在しないリポジトリを無効にします（ opt-qt57-xenial および opt-qt57-trusty ）：

Sudo add-apt-repository -r ppa:beineri/opt-qt57-xenial
Sudo add-apt-repository -r ppa:beineri/opt-qt57-trusty

Sudo apt-get update

次に、このバージョンが必要な場合は、既存の Qt 5.7.1 PPA を追加します。

Sudo add-apt-repository ppa:beineri/opt-qt571-trusty
Sudo apt-get update
Sudo apt-get dist-upgrade
1
N0rbert