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I am trying to keep updated my debian stretch on my laptop. When i run this command 

apt-get update && apt-get upgrade

it shows following output

Reading package lists... Done                                                                                                                  
E: The repository 'http://ftp.us.debian.org/debian stretch 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://ftp.us.debian.org/debian stretch-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.

Here is my sources.list

deb http://ftp.us.debian.org/debian/ stretch main
deb-src http://ftp.us.debian.org/debian/ stretch main

deb http://ftp.us.debian.org/debian/ stretch-updates main contrib
deb-src http://ftp.us.debian.org/debian/ stretch-updates main contrib

deb http://security.debian.org/debian-security stretch/updates main contrib non-free
Aitor
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Yasir Siddiqui
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1 Answers1

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As stands in the apt-secure manpage:

Starting with version 0.6, APT contains code that does signature checking of the Release file for all repositories.

This means that if apt cannot verify the signatures it wont go on. It will only update if you specify --allow-unauthenticated in apt like this:

sudo apt-get --allow-unauthenticated update

Aitor
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