我试着重新安装mysql服务器,但是在安装过程中我收到了某种警告。它被安装了,但不起作用。Setting up mysql-client-core-5.7 (5.7.23-0ubuntu0.18.04.1) ...Setting up mysql-client-5.7 (5.7.23-0ubuntu0.18.04.1) ...Setting up mysql-server-5.7 (5.7.23-0ubuntu0.18.04.1) ...
update-alternatives: using /