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ubuntu@osboxes:~$ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
The following packages will be upgraded:
  libmysqlclient21 mysql-client mysql-client-8.0 mysql-client-core-8.0 mysql-server mysql-server-8.0
  mysql-server-core-8.0
7 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 24.1 MB of archives.
After this operation, 1,196 kB of additional disk space will be used.
Do you want to continue? [Y/n] 
Get:1 http://es.archive.ubuntu.com/ubuntu focal-updates/main amd64 mysql-client-core-8.0 amd64 8.0.21-0ubuntu0.20.04.3 [4,207 kB]
Get:2 http://es.archive.ubuntu.com/ubuntu focal-updates/main amd64 mysql-client-8.0 amd64 8.0.21-0ubuntu0.20.04.3 [22.0 kB]
Get:3 http://es.archive.ubuntu.com/ubuntu focal-updates/main amd64 mysql-server-8.0 amd64 8.0.21-0ubuntu0.20.04.3 [1,249 kB]
Get:4 http://es.archive.ubuntu.com/ubuntu focal-updates/main amd64 mysql-server-core-8.0 amd64 8.0.21-0ubuntu0.20.04.3 [17.4 MB]
Get:5 http://es.archive.ubuntu.com/ubuntu focal-updates/main amd64 libmysqlclient21 amd64 8.0.21-0ubuntu0.20.04.3 [1,222 kB]
Get:6 http://es.archive.ubuntu.com/ubuntu focal-updates/main amd64 mysql-client all 8.0.21-0ubuntu0.20.04.3 [9,420 B]
Get:7 http://es.archive.ubuntu.com/ubuntu focal-updates/main amd64 mysql-server all 8.0.21-0ubuntu0.20.04.3 [9,548 B]
Fetched 24.1 MB in 2s (12.4 MB/s)  
Preconfiguring packages ...
(Reading database ... 234559 files and directories currently installed.)
Preparing to unpack .../0-mysql-client-core-8.0_8.0.21-0ubuntu0.20.04.3_amd64.deb ...
Unpacking mysql-client-core-8.0 (8.0.21-0ubuntu0.20.04.3) over (8.0.20-0ubuntu0.20.04.1) ...
Preparing to unpack .../1-mysql-client-8.0_8.0.21-0ubuntu0.20.04.3_amd64.deb ...
Unpacking mysql-client-8.0 (8.0.21-0ubuntu0.20.04.3) over (8.0.20-0ubuntu0.20.04.1) ...
Preparing to unpack .../2-mysql-server-8.0_8.0.21-0ubuntu0.20.04.3_amd64.deb ...
Unpacking mysql-server-8.0 (8.0.21-0ubuntu0.20.04.3) over (8.0.20-0ubuntu0.20.04.1) ...
Preparing to unpack .../3-mysql-server-core-8.0_8.0.21-0ubuntu0.20.04.3_amd64.deb ...
Unpacking mysql-server-core-8.0 (8.0.21-0ubuntu0.20.04.3) over (8.0.20-0ubuntu0.20.04.1) ...
Preparing to unpack .../4-libmysqlclient21_8.0.21-0ubuntu0.20.04.3_amd64.deb ...
Unpacking libmysqlclient21:amd64 (8.0.21-0ubuntu0.20.04.3) over (8.0.20-0ubuntu0.20.04.1) ...
Preparing to unpack .../5-mysql-client_8.0.21-0ubuntu0.20.04.3_all.deb ...
Unpacking mysql-client (8.0.21-0ubuntu0.20.04.3) over (8.0.20-0ubuntu0.20.04.1) ...
Preparing to unpack .../6-mysql-server_8.0.21-0ubuntu0.20.04.3_all.deb ...
Unpacking mysql-server (8.0.21-0ubuntu0.20.04.3) over (8.0.20-0ubuntu0.20.04.1) ...
Setting up mysql-client-core-8.0 (8.0.21-0ubuntu0.20.04.3) ...
Setting up libmysqlclient21:amd64 (8.0.21-0ubuntu0.20.04.3) ...
Setting up mysql-server-core-8.0 (8.0.21-0ubuntu0.20.04.3) ...
Setting up mysql-client-8.0 (8.0.21-0ubuntu0.20.04.3) ...
Setting up mysql-server-8.0 (8.0.21-0ubuntu0.20.04.3) ...
mysqld will log errors to /var/log/mysql/error.log
2020-07-29T11:06:04.239031Z 0 [ERROR] [MY-010946] [Server] Failed to start mysqld daemon. Check mysqld error log.
Warning: Unable to start the server.
Job for mysql.service failed because the control process exited with error code.
See "systemctl status mysql.service" and "journalctl -xe" for details.
invoke-rc.d: initscript mysql, action "start" failed.
● mysql.service - MySQL Community Server
     Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
     Active: activating (auto-restart) (Result: exit-code) since Wed 2020-07-29 11:06:43 UTC; 6ms ago
    Process: 9047 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
    Process: 9070 ExecStart=/usr/sbin/mysqld (code=exited, status=1/FAILURE)
   Main PID: 9070 (code=exited, status=1/FAILURE)
     Status: "Server startup in progress"
dpkg: error processing package mysql-server-8.0 (--configure):
 installed mysql-server-8.0 package post-installation script subprocess returned error exit status 1
Setting up mysql-client (8.0.21-0ubuntu0.20.04.3) ...
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.
                                                                                                          Processing triggers for systemd (245.4-4ubuntu3.2) ...
Processing triggers for man-db (2.9.1-1) ...
Processing triggers for libc-bin (2.31-0ubuntu9) ...
Errors were encountered while processing:
 mysql-server-8.0
 mysql-server
E: Sub-process /usr/bin/dpkg returned an error code (1)