Detailed explanation of MySQL 5.7.9 shutdown syntax example

shutdown ; -- For this shutdown command to be executed successfully, the shutdown permission is required.

[root@workstudio ansible]# mysql -uroot -h127.0.0.1 -- Log in to 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)
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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 ; -- Execute shutdown through the SQL interface
Query OK, 0 rows affected (0.00 sec)
-- Execute system in the mysql client to execute the Linux command. Use ps here to check whether there is the mysqld service program on Linux. 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
-- From the results of ps, we can see that the mysql database has been closed (the mysqld process no longer exists)

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)
-- Grant shutdown permission to jiangle@'localhost' user