Mysql报错：Failed to stop mysqld.service: Unit mysqld.service not loaded.

mysql安装完成后不能用命令

systemctl start mysqld       #启动

systemctl stop mysqld       #停止

解决办法：

find / -name mysql.server

会出现服务路径：

/home/swkj/tools/mysql/mysql-5.7.31-linux-glibc2.12-x86_64/support-files/mysql.server

然后根据路径启动

/home/swkj/tools/mysql/mysql-5.7.31-linux-glibc2.12-x86_64/support-files/mysql.server start

Shutting down MySQL.... SUCCESS!       输出这一行，就说明执行成功

用/home/swkj/tools/mysql/mysql-5.7.31-linux-glibc2.12-x86_64/support-files/mysql.server stop

可以关闭成功