Este é o erro que aparece depois que tento alterar qualquer coisa em Software e atualizações :
E: The repository 'http://archive.ubuntu.com/ubuntu yakkety Release'
does no longer have a Release file.
W: Updating from such a repository can't be done securely,
and is therefore disabled by default.
W: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/kilian/f.lux/ubuntu yakkety Release'
does not have a Release file.
W: Updating from such a repository can't be done securely,
and is therefore disabled by default.
W: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ppa.launchpad.net/ubuntu-wine/ppa/ubuntu yakkety Release'
does not have a Release file.