install mysql in debian 9

om flag

I need to install MySQL 7.5 on Debian 9 stretch, I tried to download it using PPA but when I try to update and complete download I get error apt-key expire.

Err:2 stretch InRelease
  The following signatures were invalid: EXPKEYSIG 8C718D3B5072E1F5 MySQL Release Engineering 
Hit:4 stretch InRelease

I tried to del the key and re-add it but still the same issue. how can I fix this issue, any help please!.

sos5020 avatar
om flag
I wasted a lot of time trying all possible solutions but to no avail.
jp flag
Please notice that the LTS support for Debian 9 will end on 2022-06-30. It might be time to upgrade to Debian 11.
sos5020 avatar
om flag
I have sup system that required Debian 9
sm flag

It is hard to find, because:

  1. MySQL don't support this version, it is 8 or 5:

  2. There is some confusion about MySQL version 7. See:

I found this site that looks like an archive for MySQL made by the University of Kent. If you want to install it through the .deb files, I'll give you the steps below:

Get the .deb file, for example:


Install it:

dpkg -i mysql-cluster-community-client-dbgsym_7.5.23-1debian10_amd64.deb

Install dependencies:

sudo apt-get -f install

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