$ sudo systemctl start mysqld Failed to start mysqld.service: Unit mysqld.service not found. [t]2022-01-18 09:16:37
$ dpkg -l | grep mysql | col | cut -f 1 ii mysql-client-8.0 ii mysql-client-core-8.0 ii mysql-common ii mysql-server ii mysql-server-8.0 ii mysql-server-core-8.0 [t]2022-01-18 09:17:51
$ mysql --version mysql Ver 8.0.27-0ubuntu0.21.04.1 for Linux on x86_64 ((Ubuntu)) [t]2022-01-18 09:18:15