MySql之授权用户权限如何设置

select * from user where user = 'root' and host='localhost';

mysql> show grants for root;
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY PASSWORD

mysql>grant all privileges on mydatabase.* to user@localhost identified by '123456';
mysql>flush privileges;//刷新系统权限表

mysql>grant select,update on testDB.* to test@localhost identified by '123456';
mysql>flush privileges; //刷新系统权限表

mysql>grant select,delete,update,create,drop on *.* to test@"%" identified by "123456";
//test用户对所有数据库都有select,delete,update,create,drop 权限。
//@"%" 表示对所有非本地主机授权，不包括localhost

mysql> grant all privileges on *.* to 'root'@'%' identified by 'abc123' with grant option;

mysql> grant select,insert,update,delete,create,drop on school.info to test@192.168.100.100 identified by '123';

mysql> grant all privileges on school.* to test@192.168.100.100 identified by '123';

mysql>grant all privileges on *.* to test@localhost identified by '123';

systemctl stop mysqld.service
mysqld --skip-grant-tables 启动数据库不使用授权表
source /etc/profile

update mysql.user set authentication_string=password ('123456') where user='root';
flush privileges; 刷新数据库
init 6 重启

[mysqld]
skip-grant-tables      //添加跳过验证命令
user=mysql
basedir = /usr/local/mysql
datadir = /usr/local/mysql/data
port = 3306
....

systemctl restart mysqld.service