CentOS7 installs Apache+PHP+MariaDB

yum install httpd

yum install php httpd-manual mod_ssl mod_perl mod_auth_mysql
yum install php-gd php-xml php-mbstring php-ldap php-pear php-xmlrpc
yum install mysql-connector-odbc mysql-devel libdbi-dbd-mysql

yum install mariadb* 

systemctl start httpd.service
systemctl start mariadb.service

systemctl enable httpd.service
systemctl enable mariadb.service

[root@rachel ~]#  mysql -u root #无密码登录数据库
Welcome tothe MariaDB monitor.  Commands endwith ; or \g.
Your MariaDB connection idis3
Server version: 5.5.44-MariaDB MariaDB Server

Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> select user, host, password from mysql.user; #检索数据库用户
+------+--------------+----------+
| user | host         | password |
+------+--------------+----------+
| root | localhost    |          |
| root | rachel       |          |
| root | 127.0.0.1    |          |
| root | ::1          |          |
|      | localhost    |          |
|      | rachel       |          |
+------+--------------+----------+6 rows inset (0.00 sec)

MariaDB [(none)]> delete from mysql.user where user='';
Query OK, 2 rows affected (0.00 sec) #删除匿名用户MariaDB [(none)]> delete from mysql.user where user='root' and host='::1'; #删除IPv6方式登录用户
Query OK, 1 row affected (0.00 sec)

MariaDB [(none)]> select user, host, password from mysql.user;  #再次查看用户
+------+--------------+----------+
| user | host         | password |
+------+--------------+----------+
| root | localhost    |          |
| root | rachel       |          |
| root | 127.0.0.1    |          |
+------+--------------+----------+3 rows inset (0.00 sec)

MariaDB [(none)]> set password for root@localhost=password('XXXXXX');  #修改本地登录密码
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> set password for root@rachel=password('XXXXXX');  #修改本地登录密码
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> set password for root@'127.0.0.1'=password('XXXXXX');  #修改本地登录密码
Query OK, 0 rows affected (0.00 sec)

MariaDB [(none)]> select user, host, password from mysql.user; #查看密码
+------+--------------+-------------------------------------------+
| user | host         | password                                  |
+------+--------------+-------------------------------------------+
| root | localhost    | *1728FCC102D8D1EB12BFXXXXXXXXXXXXXXXXXXX |
| root | rachel       | *1728FCC102D8D1EB12BFXXXXXXXXXXXXXXXXXXX |
| root | 127.0.0.1    | *1728FCC102D8D1EB12BFXXXXXXXXXXXXXXXXXXX |
+------+--------------+-------------------------------------------+3 rows inset (0.00 sec)

MariaDB [(none)]> exit#退出
Bye
[root@rachel ~]# mysql -u root -p #再次用密码登录测试
Enter password: 
Welcome tothe MariaDB monitor.  Commands endwith ; or \g.
Your MariaDB connection idis4
Server version: 5.5.44-MariaDB MariaDB Server

Copyright (c) 2000, 2015, Oracle, MariaDB Corporation Ab and others.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

MariaDB [(none)]> exit
Bye
[root@rachel ~]# #测试成功