Hello All
I'm new to Debian 10, but not new to Debian.
Using apt-cdrom add as suggested by the script below made no difference.
Changing from the main site to the Canadian mirror site made no difference.

I get the same message from the software management application - "does not have a Release file" that comes with the Debian 10 installation CD.

What is causing this error? I would prefer to fix this so I don't need the DVD to do security and other updates.


Output from apt-get update (after logging in as root):

root@debian:/home/john# apt-get update
Ign:1 cdrom://[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster InRelease
Err:2 cdrom://[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster Release
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Hit:3 http://security.debian.org buster/updates InRelease
Ign:4 http://deb.debian.org/debian buster/updates InRelease
Hit:5 http://ftp.ca.debian.org/debian buster InRelease
Err:6 http://deb.debian.org/debian buster/updates Release
404 Not Found [IP: 151.101.184.204 80]
Hit:7 http://ftp.ca.debian.org/debian buster-updates InRelease
Reading package lists... Done
E: The repository 'cdrom://[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster 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.
E: The repository 'http://deb.debian.org/debian buster/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.
root@debian:/home/john#

[Insert Debian 10.2 Installation DVD]

root@debian:/home/john# apt-get update
Ign:1 cdrom://[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster InRelease
Err:2 cdrom://[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster Release
Please use apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot be used to add new CD-ROMs
Hit:3 http://ftp.ca.debian.org/debian buster InRelease
Hit:4 http://security.debian.org buster/updates InRelease
Hit:5 http://ftp.ca.debian.org/debian buster-updates InRelease
Ign:6 http://deb.debian.org/debian buster/updates InRelease
Err:7 http://deb.debian.org/debian buster/updates Release
404 Not Found [IP: 151.101.184.204 80]
Reading package lists... Done
E: The repository 'cdrom://[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster 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.
E: The repository 'http://deb.debian.org/debian buster/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.
root@debian:/home/john#


Cheers
John

Maybe I am misunderstanding your issue but here are my assumptions:

1) Debian is installed and you can successfully boot it
2) After bringing the system up, you are running apt update and get the error message you reference above
3) You have disabled the CD in /etc/apt/sources.list

Not entirely clear from your post what the issue is so I wanted to be sure I understood first.

Hello All

I had difficulty finding my post, eventually finding it today with an internet search engine.

The system boots. Presence or absence of the distribution DVD in the DVD drive does not affect the end result of no Release file.

Contents of sources.list file:

<tof>
#

# deb cdrom:[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57]/ buster contrib main

deb cdrom:[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57]/ buster contrib main

deb http://ftp.ca.debian.org/debian/ buster main
deb-src http://ftp.ca.debian.org/debian/ buster main #Added by software-properties

deb http://deb.debian.org/debian/ buster/updates main contrib
deb-src http://deb.debian.org/debian/ buster/updates main contrib

# buster-updates, previously known as 'volatile'
deb http://ftp.ca.debian.org/debian/ buster-updates main contrib
deb-src http://ftp.ca.debian.org/debian/ buster-updates main contrib #Added by software-properties
deb http://security.debian.org/ buster/updates main
deb-src http://security.debian.org/ buster/updates main #Added by software-properties

<eof>

The issue is I am unable to install updates securely. It seems the Release file contains a key to verify the signature on the package files.

Cheers
John

Do you have Internet access? I ask because the CD is still enabled in your /etc/apt/sources.list.

The line in the output you posted states:

If you comment out the line (looks like previous line was commented, probably by the installer):

can you update?

Hello

New sources.list file:

<tof>
# deb cdrom:[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster contrib main

# deb cdrom:[Debian GNU/Linux 10.2.0 _Buster_ - Official amd64 DVD Binary-1 20191116-09:57] buster contrib main

deb http://ftp.ca.debian.org/debian/ buster main
deb-src http://ftp.ca.debian.org/debian/ buster main #Added by software-properties

deb http://deb.debian.org/debian/ buster/updates main contrib
deb-src http://deb.debian.org/debian/ buster/updates main contrib

# buster-updates, previously known as 'volatile'
deb http://ftp.ca.debian.org/debian/ buster-updates main contrib
deb-src http://ftp.ca.debian.org/debian/ buster-updates main contrib #Added by software-properties
deb http://security.debian.org/ buster/updates main
deb-src http://security.debian.org/ buster/updates main #Added by software-properties
<eof>

Resulting output from apt:

root@debian:/etc/apt# apt update
Hit:1 http://ftp.ca.debian.org/debian buster InRelease
Ign:2 http://deb.debian.org/debian buster/updates InRelease
Hit:3 http://security.debian.org buster/updates InRelease
Hit:4 http://ftp.ca.debian.org/debian buster-updates InRelease
Err:5 http://deb.debian.org/debian buster/updates Release
404 Not Found [IP: 151.101.184.204 80]
Reading package lists... Done
E: The repository 'http://deb.debian.org/debian buster/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.
root@debian:/etc/apt#

I'm inclined to think the problem has something to do with the 404 error, but I don't know what to do about it.

Cheers
John

Remove the useless line that causes the failure it is a duplicate of the proper line below it that works.

They both are doing the same thing except one is a non-functioning mirror. Oh and may as well add non-free to each of those lines in the sources.list to get software from it that may be needed like firmware for hardware in the machine. Oh and switch to mirrors which actually have some speed to them, the Canadian are useless for this purpose, try this for your sources.list

1 members found this post helpful.

The issue is solved. Thank you, HappyTux from another Canadian.

You are welcome.