apt-get update gera erro

Question

Eu recebo o seguinte erro quando executo sudo apt-get update :

Reading package lists... Error!
W: The repository 'http://ppa.launchpad.net/gijzelaar/opencv2.3/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/gijzelaar/opencv2.3/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
E: Unable to parse package file /var/lib/apt/lists/ppa.launchpad.net_gijzelaar_opencv2.3_ubuntu_dists_xenial_main_binary-amd64_Packages (1)
E: Unable to parse package file /var/lib/apt/lists/ppa.launchpad.net_gijzelaar_opencv2.3_ubuntu_dists_xenial_main_binary-i386_Packages (1)
E: Unable to parse package file /var/lib/apt/lists/ppa.launchpad.net_gijzelaar_opencv2.3_ubuntu_dists_xenial_main_binary-all_Packages (1)
E: Unable to parse package file /var/lib/apt/lists/ppa.launchpad.net_gijzelaar_opencv2.3_ubuntu_dists_xenial_main_i18n_Translation-en (1)
W: You may want to run apt-get update to correct these problems
E: The package cache file is corrupted

Como posso resolver isso? Minha versão do Ubuntu é 16.04

    

Answer 1

O ppa:gijzelaar/opencv2.3 não tem pacotes para 16.04 LTS (xenial).

A solução é remover o PPA problemático:

sudo add-apt-repository -r ppa:gijzelaar/opencv2.3
sudo rm /var/lib/apt/lists/ppa.launchpad.net_gijzelaar_opencv2.3*

Em seguida, execute sudo apt-get update e assim por diante.