I have Ubuntu 20.04. mysql-server failed to install.
Now, when I run `sudo apt install -f` I get

```
$ sudo apt install -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up mysql-server-8.0 (8.0.20-0ubuntu0.20.04.1) ...
update-alternatives: error: alternative path /etc/mysql/mysql.cnf doesn't exist
dpkg: error processing package mysql-server-8.0 (--configure):
 installed mysql-server-8.0 package post-installation script subprocess returned error exit status 2
dpkg: dependency problems prevent configuration of mysql-server:
 mysql-server depends on mysql-server-8.0; however:
  Package mysql-server-8.0 is not configured yet.

dpkg: error processing package mysql-server (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          Errors were encountered while processing:
 mysql-server-8.0
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)

```

`sudo dpkg ––configure –a` doesn't work either.
I cannot install any package.

Question is different from [mysql-server-8.0 installation problem on Ubuntu 20.04](https://askubuntu.com/questions/1238242/mysql-server-8-0-installation-problem-on-ubuntu-20-04) because I absolutely cannot install mysql-server. He managed to install it. And my package manager broke on installing it, so I can't install or remove anything now.