# apt update
Ign:1 http://us.archive.ubuntu.com/ubuntu yakkety InRelease
Ign:2 http://us.archive.ubuntu.com/ubuntu yakkety-updates InRelease
Hit:3 https://deb.nodesource.com/node_6.x yakkety InRelease
Ign:4 http://security.ubuntu.com/ubuntu yakkety-security InRelease
Ign:5 http://us.archive.ubuntu.com/ubuntu yakkety-backports InRelease
Err:6 http://us.archive.ubuntu.com/ubuntu yakkety Release
  404  Not Found [IP: 91.189.91.23 80]
Err:7 http://security.ubuntu.com/ubuntu yakkety-security Release
  404  Not Found [IP: 91.189.88.161 80]
Err:8 http://us.archive.ubuntu.com/ubuntu yakkety-updates Release
  404  Not Found [IP: 91.189.91.23 80]
Get:9 https://releases.wikimedia.org/debian jessie-mediawiki InRelease [3,185 B]
Err:10 http://us.archive.ubuntu.com/ubuntu yakkety-backports Release
  404  Not Found [IP: 91.189.91.23 80]
Err:9 https://releases.wikimedia.org/debian jessie-mediawiki InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 90E9F83F22250DD7
Reading package lists... Done
E: The repository 'http://us.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://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://us.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://us.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.
W: GPG error: https://releases.wikimedia.org/debian jessie-mediawiki InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 90E9F83F22250DD7
E: The repository 'https://releases.wikimedia.org/debian jessie-mediawiki InRelease' is not signed.
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.
root@fusion:/home/kazan# lsb_release -a
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 16.10
Release:	16.10
Codename:	yakkety