Após um longo período de tentativas, estou muito empenhado em encontrar uma maneira de instalar o software necessário através do apt-get ou do apt. Por exemplo, ao instalar o thunar, há esse erro:
$ sudo apt install thunar
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package thunar is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'thunar' has no installation candidate
Eu tentei o seguinte:
sudo apt-get update --fix-missing sudo apt-get upgrade sudo apt-get dist-upgrade sudo apt-get autoremove sudo apt-get -f install Mas ainda há o mesmo problema. Eu suspeitava que poderia ser devido a uma enorme confusão em sources.list , então fui ao centro de software e reverti a lista selecionando a opção Best Server . No entanto, isso não ajudou em nada. Na verdade, quando tentei isso duas vezes e obtive dois servidores diferentes diferentes, suspeito que não seja um problema dos servidores.
Aqui está meu sources.list :
#------------------------------------------------------------------------------#
# OFFICIAL UBUNTU REPOS #
#------------------------------------------------------------------------------#
###### Ubuntu Main Repos
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial main restricted universe multiverse
###### Ubuntu Update Repos
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial-security main restricted universe multiverse
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial-updates main restricted universe multiverse
deb http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial-proposed main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial-security main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial-updates main restricted universe multiverse
deb-src http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/ xenial-proposed main restricted universe multiverse
#------------------------------------------------------------------------------#
# UNOFFICIAL UBUNTU REPOS #
#------------------------------------------------------------------------------#
###### 3rd Party Binary Repos
#### Wine PPA - https://launchpad.net/~ubuntu-wine/+archive/ppa/
## Run this command: sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 883E8688397576B6C509DF495A9A06AEF9CB8DB0
deb http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial main
####### 3rd Party Source Repos
#### Wine PPA (Source) - https://launchpad.net/~ubuntu-wine/+archive/ppa/
## Run this command: sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 883E8688397576B6C509DF495A9A06AEF9CB8DB0
deb-src http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu xenial main
A partir da atualização, recebo o seguinte erro:
Err:102 http://ftp.cuhk.edu.hk/pub/Linux/ubuntu xenial-security/main arm64 Packages
404 Not Found [IP: 137.189.4.14 80]
Ign:112 http://ftp.cuhk.edu.hk/pub/Linux/ubuntu xenial-security/universe arm64 Packages
Ign:63 http://ppa.launchpad.net/mc3man/trusty-media/ubuntu xenial/main DEP-11 64x64 Icons
Err:127 http://ftp.cuhk.edu.hk/pub/Linux/ubuntu xenial-updates/main arm64 Packages
404 Not Found [IP: 137.189.4.14 80]
Ign:137 http://ftp.cuhk.edu.hk/pub/Linux/ubuntu xenial-updates/universe arm64 Packages
Ign:143 http://ftp.cuhk.edu.hk/pub/Linux/ubuntu xenial-updates/multiverse arm64 Packages
Err:151 http://ftp.cuhk.edu.hk/pub/Linux/ubuntu xenial-proposed/main arm64 Packages
404 Not Found [IP: 137.189.4.14 80]
Ign:158 http://ftp.cuhk.edu.hk/pub/Linux/ubuntu xenial-proposed/universe arm64 Packages
Err:64 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main Sources
404 Not Found
Ign:65 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main amd64 Packages
Ign:66 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main i386 Packages
Ign:67 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main arm64 Packages
Ign:68 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main all Packages
Ign:69 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main Translation-en_US
Ign:70 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main Translation-en
Ign:71 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:72 http://ppa.launchpad.net/richardgv/compton/ubuntu xenial/main DEP-11 64x64 Icons
Err:73 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main Sources
404 Not Found
Ign:83 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main amd64 Packages
Ign:84 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main i386 Packages
Ign:76 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main arm64 Packages
Ign:77 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main all Packages
Ign:78 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main Translation-en_US
Ign:85 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main Translation-en
Ign:80 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main amd64 DEP-11 Metadata
Ign:81 http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu xenial/main DEP-11 64x64 Icons
Fetched 37.2 MB in 1min 11s (520 kB/s)
Reading package lists... Done
W: file:///var/cuda-repo-8-0-local/Release.gpg: Signature by key 889BEE522DA690103C4B085ED88C3D385C37D3BE uses weak digest algorithm (SHA1)
W: Invalid 'Date' entry in Release file /var/lib/apt/lists/_var_cuda-repo-8-0-local_Release
W: Invalid 'Date' entry in Release file /var/lib/apt/lists/_var_libopencv4tegra-repo_Release
W: Invalid 'Date' entry in Release file /var/lib/apt/lists/_var_visionworks-repo_Release
W: Invalid 'Date' entry in Release file /var/lib/apt/lists/_var_visionworks-sfm-repo_Release
W: Invalid 'Date' entry in Release file /var/lib/apt/lists/_var_visionworks-tracking-repo_Release
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://build.openvpn.net/debian/openvpn/stable xenial Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8E6DA8B4E158C569
N: Skipping acquire of configured file 'main/binary-arm64/Packages' as repository 'https://apt.dockerproject.org/repo ubuntu-xenial InRelease' doesn't support architecture 'arm64'
W: GPG error: http://download.opensuse.org/repositories/home:/Horst3180/xUbuntu_16.04 Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 5A7D1D38BEB6D886
W: The repository 'http://download.opensuse.org/repositories/home:/Horst3180/xUbuntu_16.04 Release' is not signed.
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.
N: Skipping acquire of configured file 'stable/binary-arm64/Packages' as repository 'https://www.perfect-privacy.com/repos/linux/debian perfect-privacy-vpn InRelease' doesn't support architecture 'arm64'
W: The repository 'http://ppa.launchpad.net/mc3man/trusty-media/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.
W: The repository 'http://ppa.launchpad.net/richardgv/compton/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.
W: The repository 'http://ppa.launchpad.net/varlesh-l/papirus-pack/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.
W: Failed to fetch http://build.openvpn.net/debian/openvpn/stable/dists/xenial/Release.gpg The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 8E6DA8B4E158C569
E: Failed to fetch http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/dists/xenial/main/binary-arm64/Packages 404 Not Found [IP: 137.189.4.14 80]
E: Failed to fetch http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/dists/xenial-security/main/binary-arm64/Packages 404 Not Found [IP: 137.189.4.14 80]
E: Failed to fetch http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/dists/xenial-updates/main/binary-arm64/Packages 404 Not Found [IP: 137.189.4.14 80]
E: Failed to fetch http://ftp.cuhk.edu.hk/pub/Linux/ubuntu/dists/xenial-proposed/main/binary-arm64/Packages 404 Not Found [IP: 137.189.4.14 80]
E: Failed to fetch http://ppa.launchpad.net/mc3man/trusty-media/ubuntu/dists/xenial/main/source/Sources 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/richardgv/compton/ubuntu/dists/xenial/main/source/Sources 404 Not Found
E: Failed to fetch http://archive.ubuntukylin.com:10006/ubuntukylin/dists/xenial/main/binary-arm64/Packages 404 Not Found
E: Failed to fetch http://ppa.launchpad.net/varlesh-l/papirus-pack/ubuntu/dists/xenial/main/source/Sources 404 Not Found
W: Some index files failed to download. They have been ignored, or old ones used instead.
E o erro "Falha ao buscar" é consistente mesmo depois de alterar os servidores para o principal. Eu não tenho ideia de por que isso acontece.
Tópicos que analisei:
Existe algo que eu possa fazer para resolver isso? Atualmente, estou sobrevivendo em pacotes existentes que eu poderia instalar antes de baixar problemas. Espero que exista um especialista que possa diagnosticar e resolver este problema.
O maior culpado que eu suspeito é devido a minha instalação do Jetpack da NVIDIA, como visto aqui:
e aqui: link
Concluí que removi a arquitetura arm64 em questão de acordo com o thread, mas meu sistema ainda está quebrado e não tenho como corrigir isso. É bastante preocupante, pois desde o fórum da NVIDIA, não há ninguém respondendo e as pessoas mencionaram que ele quebra todo o sistema do Ubuntu. Espero que os especialistas possam descobrir esse problema difícil.
Nota: Eu já fiz uma pergunta semelhante em link link mas não consegui encontrar uma solução, então eu decidi tentar a minha sorte aqui desde que eu tenho lutado com esse problema por um longo tempo.