MySQL to revise the root password

修改root账号密码

示例一：

# IP地址
192.168.70.133	

# root 账号密码
Ncayu@bNuPc3

# 更改密码：
ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '[email protected]';

# 刷新一下
flush privileges;

# Test whether you can log in normally after changing the account password
mysql -u root -p Ncayu@bNuPc3

示例二：

先修改root账号的“%”权限为“localhost”权限;rootAccounts can only be used locally

修改root账号的密码,Passwords are complex,meet password complexity.

# IP地址 192.168.70.136

shang@Ds9Ed6

mysql> use mysql;
Database changed
mysql> update user set host = "localhost" where user = "root" and host = "%";
Query OK, 1 row affected (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 0

mysql> select user,host from mysql.user;

更改密码：

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '[email protected]';
Query OK, 0 rows affected (0.00 sec)

# Test whether you can log in normally after changing the account password
mysql -u root -p shang@Ds9Ed6

Database account permission recovery

# Database account permission recovery

四、回收权限
删除ncayu这个用户的create权限,该用户将不能创建数据库和表.
revoke all privileges on `webapp`.* from 'ncayu'@'%';

mysql> revoke create on *.* from '[email protected]';
mysql> flush privileges;


3.revoke撤销权限
#revoke跟grant语法差不多,只需要把关键字 “to” 换成 “from” 即可,并且revoke语句中不需要跟密码设置.
注意：revoke可以回收所有权限,也可以回收部分权限.