Sou relativamente novo no Linux, então ainda estou tentando descobrir isso.
Executando apt-get update , recebo vários erros de repositório
Err http://ppa.launchpad.net trusty/main/amd64 amd64 Packages
403 Forbidden
Err http://ppa.launchpad.net trusty/main/amd64 i386 Packages
403 Forbidden
Ign http://ppa.launchpad.net trusty/main/amd64 Translation-en
Ign http://ppa.launchpad.net trusty/main Translation-en
Ign http://ppa.launchpad.net trusty/main Translation-en
Err http://ppa.launchpad.net trusty/main amd64 Packages
404 Not Found
Err http://ppa.launchpad.net trusty/main i386 Packages
404 Not Found
Ign http://ppa.launchpad.net trusty/main Translation-en
Fetched 72 B in 15s (4 B/s)
W: GPG error: http://extras.ubuntu.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 16126D3A3E5C1192
W: Failed to fetch http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu/dists/trusty/main/amd64/binary-amd64/Packages 403 Forbidden
W: Failed to fetch http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu/dists/trusty/main/amd64/binary-i386/Packages 403 Forbidden
W: Failed to fetch http://ppa.launchpad.net/ubuntu-x-swat/updates/ubuntu/dists/trusty/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/ubuntu-x-swat/updates/ubuntu/dists/trusty/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
Principalmente, estou tentando instalar drivers gráficos básicos da Intel.
Estou brincando com o meu sources.list, mas até agora não tive sucesso.
Este é o meu atual sources.list :
deb http://archive.ubuntu.com/ubuntu trusty main restricted universe
deb http://archive.ubuntu.com/ubuntu trusty-updates main restricted universe
deb http://security.ubuntu.com/ubuntu trusty-security main restricted universe multiverse
deb http://archive.canonical.com/ubuntu trusty partner
deb http://us.archive.ubuntu.com/ubuntu trusty main multiverse
deb http://ppa.launchpad.net/ubuntu-x-swat/x-updates/ubuntu trusty/main amd64
deb http://extras.ubuntu.com/ubuntu trusty main
Toda a ajuda on-line que encontrei até agora tende a ser antiga e ultrapassada.
Agradecemos antecipadamente pela ajuda
INFORMAÇÕES ADICIONADAS
/etc/apt/sources.list.d/fossfreedom-packagefixes-trusty.list:deb http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu trusty main
/etc/apt/sources.list.d/fossfreedom-packagefixes-trusty.list:# deb-src http://ppa.launchpad.net/fossfreedom/packagefixes/ubuntu trusty main
/etc/apt/sources.list.d/jonathonf-ffmpeg-3-trusty.list:deb http://ppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu trusty main
/etc/apt/sources.list.d/jonathonf-ffmpeg-3-trusty.list:# deb-src http://ppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu trusty main
/etc/apt/sources.list.d/jonathonf-ffmpeg-3-trusty.list:# deb-src http://ppa.launchpad.net/jonathonf/ffmpeg-3/ubuntu trusty main
/etc/apt/sources.list.d/kirillshkrogalev-ffmpeg-next-trusty.list:deb http://ppa.launchpad.net/kirillshkrogalev/ffmpeg-next/ubuntu trusty main
/etc/apt/sources.list.d/kirillshkrogalev-ffmpeg-next-trusty.list:# deb-src http://ppa.launchpad.net/kirillshkrogalev/ffmpeg-next/ubuntu trusty main
/etc/apt/sources.list.d/obsproject-obs-studio-trusty.list:deb http://ppa.launchpad.net/obsproject/obs-studio/ubuntu trusty main
/etc/apt/sources.list.d/obsproject-obs-studio-trusty.list:# deb-src http://ppa.launchpad.net/obsproject/obs-studio/ubuntu trusty main
/etc/apt/sources.list.d/oibaf-graphics-drivers-trusty.list:deb http://ppa.launchpad.net/oibaf/graphics-drivers/ubuntu trusty main
/etc/apt/sources.list.d/oibaf-graphics-drivers-trusty.list:# deb-src http://ppa.launchpad.net/oibaf/graphics-drivers/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-x-swat-ppa-trusty.list:deb http://ppa.launchpad.net/ubuntu-x-swat/ppa/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-x-swat-ppa-trusty.list:# deb-src http://ppa.launchpad.net/ubuntu-x-swat/ppa/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-x-swat-updates-trusty.list:deb http://ppa.launchpad.net/ubuntu-x-swat/updates/ubuntu trusty main
/etc/apt/sources.list.d/ubuntu-x-swat-updates-trusty.list:# deb-src http://ppa.launchpad.net/ubuntu-x-swat/updates/ubuntu trusty main