After UP8 upgrade problem

[gromada]

Upgrade went very well, but now I can not update repository.

If I stay with default repositories (UP8 info), I've got:
# apt-get update
Ign http://linux-mint.froonix.org debian InRelease
Ign http://dl.google.com stable InRelease
Hit http://repo.mate-desktop.org jessie InRelease
Get:1 http://linux-mint.froonix.org debian Release.gpg [198 B]
Hit http://lmde-mirror.gwendallebihan.net testing InRelease
E: Release file for http://lmde-mirror.gwendallebihan.net/l ... /InRelease is expired (invalid since 50d 11h 51min 3s). Updates for this repository will not be applied.

If I change them into
deb http://debian.linuxmint.com/latest testing main contrib non-free
deb-src http://debian.linuxmint.com/latest testing main contrib non-free
I've got:
W: Failed to fetch http://debian.linuxmint.com/latest/dist ... ce/Sources 404 Not Found
W: Failed to fetch http://debian.linuxmint.com/latest/dist ... ce/Sources 404 Not Found
W: Failed to fetch http://debian.linuxmint.com/latest/dist ... 4/Packages 404 Not Found
W: Failed to fetch http://debian.linuxmint.com/latest/dist ... 4/Packages 404 Not Found
W: Failed to fetch http://debian.linuxmint.com/latest/dist ... 6/Packages 404 Not Found
W: Failed to fetch http://debian.linuxmint.com/latest/dist ... 6/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.

What can I do to fix it?
Thanks

[gromada]

If I put into /etc/apt/sources.list only:

deb http://packages.linuxmint.com/ debian main upstream import

than there's no error and many packages needs to be upgrade, but I don't now if the system would be stable and if this is correct way to solve the problem?
Clem?

[Monsta]

Wouldn't it be easier to read the UP8 announcement to find out which mirrors are safe to use?

[Getafix]

If you had opted the mirrors during update, after that you must return to the official repositories since that is the default. Then do a apt-get update to see if it was a temporary issue you faced. If there is still any error we can try to fix it.

[abtygwyn]

Bought a new laptop and installed LMDE on it using the latest download. Had to use a USB stick since I couldn't find a DVD. No problem seems to work, but I noticed that I no longer have the normal sources.list file in /etc/apt/sources.list

I do have an official-package-repositories.list which resides in sources.list.d

Is this set-up sustainable or do I need to create a sources.list file?

Thanks

[halogen]

Is this set-up sustainable or do I need to create a sources.list file?

Yes, it's fine. LMDE uses the sources.list.d (where you can put one or more text files containing lists of repositories) instead of a single sources.list file.

[abtygwyn]

Is this set-up sustainable or do I need to create a sources.list file?

Yes, it's fine. LMDE uses the sources.list.d (where you can put one or more text files containing lists of repositories) instead of a single sources.list file.

Thanks. I was concerned so I went on the chat channel and got confirmation re the changes.