1 查看MySQL服务器是否开启
ps -ef | grep mysqld
2 用户管理
1)创建用户
// 给用户授权,privileges可以使select、insert等
grant privileges on database.table to 'username'@'hostname' [identified by 'password'];
// 不授权,创建用户
create user 'username'@'hostname' identified by 'password';
// 添加用户
insert into mysql.user (host,user,password) values('hostname','username',password('password'));
// 刷新权限
flush privileges;
2)删除用户
// 方法一
drop user 'username'@'hostname';
// 方法二
delete from mysql.user where ...;
flush privileges;
3)修改用户(root)密码
// 方法1
mysqladmin -u username -p password new_password;
// 方法2
update mysql.user set password=password('new_password') where ....;
flush privileges;
// 方法3
set password=password('new_password');
4)root用户修改其他用户密码
set password for 'username'@'hostname'=password('new_password');
3 权限管理
1)授予权限
grant privileges on database.table to 'username'@'hostname' identified by 'new_password';
2)查看权限
show grants for 'username'@'hostname';
3)收回权限
revoke privileges on database.table from 'username'@'hostname';