# Utilisateurs



### Voir tous les utilisateurs MySQL:

ainsi que les hosts auxquels ils ont le droit de se connecter.

```mysql
MariaDB [(none)]> SELECT user,host from mysql.user;
+-----------------+-----------+
| User            | Host      |
+-----------------+-----------+
| adm_wp          | localhost |
| bruno           | localhost |
| mariadb.sys     | localhost |
| mysqlbackupuser | localhost |
| newuser         | localhost |
| root            | localhost |
+-----------------+-----------+
6 rows in set (0.001 sec)
```

on affiche également les mots-de-passe.

```mysql
MariaDB [(none)]> SELECT host,user,password FROM mysql.user;

# MySQL 5.7+
MariaDB [(none)]> SELECT host,user,authentication_string FROM mysql.user;
```



### Créer un utilisateur:

`mysql> CREATE USER theuser;`

```mysql
MariaDB [(none)]> CREATE USER 'theuser'@'localhost' IDENTIFIED BY 'the_password';
```

Lui donner tous les droits:

```mysql
MariaDB [(none)]> GRANT ALL PRIVILEGES ON * . * TO 'theuser'@'localhost';
MariaDB [(none)]> FLUSH PRIVILEGES
```



### Supprimer un utilisateur:

`mysql> DROP USER theuser;`

```mysql
MariaDB [(none)]> DROP USER 'theuser'@'localhost';
Query OK, 0 rows affected (0.023 sec)
```



### Renommer un utilisateur:

`mysql> RENAME USER theuser;`

```mysql
MariaDB [(none)]> RENAME USER 'theuser'@'localhost' TO 'the_user'@'localhost';
Query OK, 0 rows affected (0.038 sec)
```

