centos7 mariadb设置初始密码

通过yum安装mariadb mariadb-server后设置一个初始密码。

首先启动mariadb服务，然后输入mysql进入mariadb控制台：

[root@localhost ~]# mysql
Welcome to the MariaDB monitor.  Commands end with ; or \g.
Your MariaDB connection id is 2
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.

输入 uuse mysql;

MariaDB [(none)]> use mysql;
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed

输入修改密码的命令：

update user set password=password("这里替换成你的密码")where user='root';

MariaDB [mysql]> update user set password=password("yoonching")where user='root';
Query OK, 4 rows affected (0.00 sec)
Rows matched: 4  Changed: 4  Warnings: 0

输入 flush privileges;

MariaDB [mysql]> flush privileges;
Query OK, 0 rows affected (0.00 sec)

输入exit退出

MariaDB [mysql]> exit
Bye

测试：在命令行输入mysql，不带登录信息

[root@localhost ~]# mysql
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)

无法进入。

再测试：带登录信息

root@localhost ~]# mysql -uroot -pyoonching
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.

密码设置成功！