Eu tentei atualizar o apt-get no meu sistema Ubuntu devido a alguns problemas
sudo apt-get update
Mas isso me dá esse erro
Hit:1 http://ppa.launchpad.net/webupd8team/java/ubuntu yakkety InRelease
Ign:2 http://in.archive.ubuntu.com/ubuntu yakkety InRelease
Ign:3 http://security.ubuntu.com/ubuntu yakkety-security InRelease
Err:4 http://security.ubuntu.com/ubuntu yakkety-security Release
404 Not Found [IP: 91.189.88.149 80]
Ign:5 http://in.archive.ubuntu.com/ubuntu yakkety-updates InRelease
Ign:6 http://in.archive.ubuntu.com/ubuntu yakkety-backports InRelease
Err:7 http://in.archive.ubuntu.com/ubuntu yakkety Release
404 Not Found [IP: 91.189.88.161 80]
Err:8 http://in.archive.ubuntu.com/ubuntu yakkety-updates Release
404 Not Found [IP: 91.189.88.161 80]
Err:9 http://in.archive.ubuntu.com/ubuntu yakkety-backports Release
404 Not Found [IP: 91.189.88.161 80]
Reading package lists... Done
E: The repository 'http://security.ubuntu.com/ubuntu yakkety-security Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu yakkety Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu yakkety-updates Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://in.archive.ubuntu.com/ubuntu yakkety-backports Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Eu tentei algumas das soluções dadas para 'Releases não encontradas', mas nenhuma delas parece funcionar. Não tenho certeza de como resolver isso. Aprecie altamente qualquer ajuda.