shutdown ; -- 这个shutdown要执行成功要有shutdown权限才行。

[root@workstudio ansible]# mysql -uroot -h127.0.0.1 -- 登录进mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.18-enterprise-commercial-advanced-log MySQL Enterprise Server - Advanced Edition (Commercial)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
mysql> shutdown ; -- 通过SQL接口的方式执行shutdown
Query OK, 0 rows affected (0.00 sec)
-- 在mysql客户端下执行system 来执行linux命令 这里用ps来查看linux上有没有mysqld 这个服务程序了
mysql> system ps -ef | grep mysql
root    5709  3403 0 13:32 pts/0  00:00:00 mysql -uroot -h127.0.0.1
root    5720  5709 0 13:33 pts/0  00:00:00 sh -c ps -ef | grep mysql
root    5722  5720 0 13:33 pts/0  00:00:00 grep mysql
-- 由ps的结果可以看出mysql数据库已经关闭了(mysqld这个进程没有了)

mysql> shutdown;
ERROR 1227 (42000): Access denied; you need (at least one of) the SHUTDOWN privilege(s) for this operation

mysql> grant shutdown on *.* to jiangle@‘localhost‘ ;
Query OK, 0 rows affected, 1 warning (0.00 sec)
-- 授予jiangle@‘localhost‘用户shutdown权限