The repository 'http://security.ubuntu.com/ubuntu zesty-security Release' does not have a Release file.

[malakhovks]

W: The repository 'http://security.ubuntu.com/ubuntu zesty-security Release' does not have a Release file.
W: The repository 'http://archive.ubuntu.com/ubuntu zesty Release' does not have a Release file.
W: The repository 'http://archive.ubuntu.com/ubuntu zesty-updates Release' does not have a Release file.
W: The repository 'http://archive.ubuntu.com/ubuntu zesty-backports Release' does not have a Release file.
E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/zesty-security/multiverse/source/Sources  404  Not Found [IP: 91.189.88.162 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/zesty/universe/source/Sources  404  Not Found [IP: 91.189.88.149 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/zesty-updates/universe/source/Sources  404  Not Found [IP: 91.189.88.149 80]
E: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/zesty-backports/restricted/source/Sources  404  Not Found [IP: 91.189.88.149 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.