仅新建一个newuser用户
方法一：
MariaDB [(none)]> create user newuser@localhost identified by '123456';
Query OK, 0 rows affected (0.22 sec)
MariaDB [(none)]> select user from mysql.user;
+---------+
| user |
+---------+
| aa |
| root |
| root |
| |
| aa |
| bb |
| lcz |
| my |
| mytest |
| newuser |
| nome |
| root |
| |
| root |
+---------+
14 rows in set (0.00 sec)
MariaDB [(none)]>
方法二：
MariaDB [(none)]> insert into mysql.user(user,host,password) values('ggo','localhost',password('1234'));
Query OK, 1 row affected, 4 warnings (0.24 sec)
MariaDB [(none)]> flush privileges;
Query OK, 0 rows affected (0.25 sec)
效果
[root@localhost ~]# mysql -uggo -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ; or \g.
Your MariaDB connection id is 4
Server version: 5.5.52-MariaDB MariaDB Server
Copyright (c) 2000, 2016, Oracle, MariaDB Corporation Ab and others.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
MariaDB [(none)]>
新建一个my用户并且授权全部操作权限
MariaDB [(none)]> grant all privileges on *.* to my@localhost identified by '123456';
Query OK, 0 rows affected (0.00 sec)
MariaDB [(none)]> select user from mysql.user;
+--------+
| user |
+--------+
| aa |
| root |
| root |
| |
| aa |
| bb |
| lcz |
| my |
| mytest |
| nome |
| root |
| |
| root |
+--------+
13 rows in set (0.14 sec)
MariaDB [(none)]>
查看用户权限
MariaDB [(none)]> show grants for my@localhost;
+--------------------------------------------------------------------------------------------------------------------+
| Grants for my@localhost | +--------------------------------------------------------------------------------------------------------------------+
| GRANT ALL PRIVILEGES ON *.* TO 'my'@'localhost' IDENTIFIED BY PASSWORD '*6BB4837EB74329105EE4568DDA7DC67ED2CA2AD9' | +--------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)
MariaDB [(none)]>
指定部分授权
grant insert,update,delete,select on *.* to mytest@localhost;