如何在 Ubuntu 20.04 上啟動 mysql 伺服器

Question

我透過 WSL 2 安裝了 Ubuntu，如下所示：Ubuntu 20.04.4 LTS (GNU/Linux 5.10.102.1-microsoft-standard-WSL2 x86_64)

我正在嘗試使用此命令安裝 mysql-server，“sudo apt install mysql-server”

（https://ubuntu.com/server/docs/databases-mysql）

我安裝它

mysql --version
mysql  Ver 8.0.31-0ubuntu0.20.04.1 for Linux on x86_64 ((Ubuntu))

但此後它不會開始。

(base) bluetail14@LAPTOP-28BMMQV7:~$ sudo service mysql start
 * Starting MySQL database server mysqld

(base) bluetail14@LAPTOP-28BMMQV7:~$ sudo service mysql restart                                                  [ OK ]
 * Starting MySQL database server mysqld                                                                                su: warning: cannot change directory to /nonexistent: No such file or directory

我嘗試過一組這些命令：

這一項是更改主目錄。

(base) bluetail14@LAPTOP-28BMMQV7:~$ sudo usermod -d /var/lib/mysql/ mysql
usermod: user mysql is currently used by process 3622

(base) bluetail14@LAPTOP-28BMMQV7:~$ sudo systemctl stop mysql.service
System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to bus: Host is down
(base) bluetail14@LAPTOP-28BMMQV7:~$ sudo usermod -d /var/lib/mysql/ mysql
usermod: user mysql is currently used by process 3622
(base) bluetail14@LAPTOP-28BMMQV7:~$ sudo systemctl start mysql.service
System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to bus: Host is down

所以看來我需要配置一個不存在的主目錄或其他目錄？我怎樣才能正確設定它？