查看linux安装的mysql

您可以通过以下命令查看Linux系统上是否安装了MySQL：

systemctl status mysql

如果MySQL已经安装并正在运行，您将看到类似于以下内容的输出：

● mysql.service - MySQL Community Server
   Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2021-08-10 14:20:00 UTC; 1 weeks 0 days ago
 Main PID: 1234 (mysqld)
    Tasks: 28 (limit: 4915)
   Memory: 1.2G
   CGroup: /system.slice/mysql.service
           └─1234 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid

Aug 10 14:20:00 ubuntu systemd[1]: Starting MySQL Community Server...
Aug 10 14:20:00 ubuntu systemd[1]: Started MySQL Community Server.

如果MySQL未安装，则会显示“Unit mysql.service could not be found.”的错误消息。