sudo mkdir -p /etc/mysql/conf.d && sudo apt -f install
[sudo] password for aitadmin:
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-5.7 (5.7.26-0ubuntu0.18.04.1) ...
Renaming removed key_buffer and myisam-recover options (if present)
Created symlink /etc/systemd/system/multi-user.target.wants/mysql.service → /lib/systemd/system/mysql.service.
Setting up default-mysql-server (1.0.4) .......................................................................
W: APT had planned for dpkg to do more than it reported back (3 vs 7).
   Affected packages: mysql-server-5.7:amd64