[Solved] Having problems with updating after switching to a closer mirror

[bc0pants]

Hello, after installation i decided to switch to a closer mirror of Debian. I did so through the software & updates application. Afterwards i tried to run sudo apt update and it resulted into this error:

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E: The repository 'http://security.debian.org/debian-security stable/updates Release' does not 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.

What can I do to fix it? Thanks in advance!

[sunrat]

If it worked before you changed the mirror, I suggest to revert to the original mirror.

I'm guessing your sources are incorrect. Post your sources.list:

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cat /etc/apt/sources.list

[bc0pants]

This is the output:

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# Debian packages for stable
deb http://ftp.uni-sofia.bg/debian/ stable main contrib
# Uncomment the deb-src line if you want 'apt-get source'
# to work with most packages.
# deb-src http://ftp.uni-sofia.bg/debian/ stable main contrib

# Security updates for stable
deb http://security.debian.org/debian-security stable/updates main
deb http://mirrors.netix.net/debian/ bookworm main contrib non-free-firmware non-free
deb-src http://mirrors.netix.net/debian/ bookworm main contrib non-free-firmware non-free #Added by software-properties

[jmgibson1981]

While I can't and won't claim to know how the Debian mirrors work I can say that for Arch sometimes the mirrors don't work correctly. Seems quite rare but a few times when I've done various installs while distro hopping I've had to adjust my available mirrors because they just timeout repeatedly. Possible similar problem? Just because it's a closer repo doesn't make it immune to problems wherever it is geographically located.

[milomak]

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deb http://security.debian.org/debian-security stable/updates main

should that be stable/updates or bookworm-security?

[fabien]

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deb http://security.debian.org/debian-security stable/updates main

should that be stable/updates or bookworm-security?

Indeed, the format changed with Bullseye

5.1.3. Changed security archive layout

For bullseye, the security suite is now named bullseye-security instead of codename/updates and users should adapt their APT source-list files accordingly when upgrading.

The security line in your APT configuration may look like:

deb https://deb.debian.org/debian-security bullseye-security main contrib

The Debian Wiki has examples of correct sources.list