sudo dpkg --configure -a
Setting up mysql-server-8.0 (8.0.17-0ubuntu2) ...
Renaming removed key_buffer and myisam-recover options (if present)
mysqld will log errors to /var/log/mysql/error.log
2019-11-18T03:19:41.749360Z 0 [ERROR] [MY-011065] [Server] Unable to determine if daemon is running: No such file or directory (rc=0).
2019-11-18T03:19:41.749380Z 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 Sun 2019-11-17 22:19:43 EST; 5ms ago
  Process: 8301 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
  Process: 8313 ExecStart=/usr/sbin/mysqld (code=exited, status=2)
 Main PID: 8313 (code=exited, status=2)
   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
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
Errors were encountered while processing:
 mysql-server-8.0
 mysql-server