centos7 mysql数据库安装和配置 – starof

一、系统环境

yum update升级以后的系统版本为

[[email protected] yl]# cat /etc/redhat-release
CentOS Linux release 7.1.1503 (Core)

二、mysql安装

一般网上给出的资料都是

#yum install mysql
#
yum install mysql-server
#
yum install mysql-devel

安装mysql和mysql-devel都成功,但是安装mysql-server失败,如下:

[[email protected] yl]# yum install mysql-server
Loaded plugins: fastestmirror
Loading mirror speeds
from cached hostfile
* base: mirrors.sina.cn
* extras: mirrors.sina.cn
* updates: mirrors.sina.cn
No package mysql
server available.
Error: Nothing to do

查资料发现是CentOS 7 版本将MySQL数据库软件从默认的程序列表中移除,用mariadb代替了。

有两种解决办法:

1、方法一:安装mariadb

MariaDB数据库管理系统是MySQL的一个分支,主要由开源社区在维护,采用GPL授权许可。开发这个分支的原因之一是:甲骨文公司收购了MySQL后,有将MySQL闭源的潜在风险,因此社区采用分支的方式来避开这个风险。MariaDB的目的是完全兼容MySQL,包括API和命令行,使之能轻松成为MySQL的代替品。

安装mariadb,大小59 M。

[[email protected] yl]# yum install mariadb-server mariadb

mariadb数据库的相关命令是:

systemctl start mariadb  #启动MariaDB

systemctl stop mariadb  #停止MariaDB

systemctl restart mariadb  #重启MariaDB

systemctl enable mariadb  #设置开机启动

所以先启动数据库

[[email protected] yl]# systemctl start mariadb

然后就可以正常使用mysql了

[[email protected] yl]# mysql -u root -p
Enter password:
Welcome to the MariaDB monitor. Commands end with ;
or g.
Your MariaDB connection id
is 3
Server version:
5.5.41-MariaDB MariaDB Server

Copyright (c) 2000, 2014, Oracle, MariaDB Corporation Ab and others.

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

MariaDB [(none)]> show databases;
+——————–+
| Database |
+——————–+
| information_schema |
| mysql |
| performance_schema |
| test |
+——————–+
4 rows in set (0.00 sec)

MariaDB [(none)]>

安装mariadb后显示的也是 MariaDB [(none)]> ,可能看起来有点不习惯。下面是第二种方法。

2、方法二:官网下载安装mysql-server

# wget http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm
#
rpm -ivh mysql-community-release-el7-5.noarch.rpm
#
yum install mysql-community-server

安装成功后重启mysql服务。

# service mysqld restart

初次安装mysql,root账户没有密码。

[[email protected] yl]# mysql -u root
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id
is 3
Server version:
5.6.26 MySQL Community Server (GPL)

Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

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

mysql> show databases;
+——————–+
| Database |
+——————–+
| information_schema |
| mysql |
| performance_schema |
| test |
+——————–+
4 rows in set (0.01 sec)

mysql>

设置密码

mysql> set password for root@localhost =password(password);
Query OK, 0 rows affected (
0.00 sec)

mysql>

不需要重启数据库即可生效。

在mysql安装过程中如下内容:

Installed:
  mysql-community-client.x86_64 0:5.6.26-2.el7                mysql-community-devel.x86_64 0:5.6.26-2.el7                
  mysql-community-libs.x86_64 0:5.6.26-2.el7                  mysql-community-server.x86_64 0:5.6.26-2.el7               

Dependency Installed:
  mysql-community-common.x86_64 0:5.6.26-2.el7                                                                            

Replaced:
  mariadb.x86_64 1:5.5.41-2.el7_0          mariadb-devel.x86_64 1:5.5.41-2.el7_0   mariadb-libs.x86_64 1:5.5.41-2.el7_0  
  mariadb-server.x86_64 1:5.5.41-2.el7_0 

所以安装完以后mariadb自动就被替换了,将不再生效。

[[email protected] yl]# rpm -qa |grep mariadb
[[email protected] yl]#

三、配置mysql

1、编码

mysql配置文件为/etc/my.cnf

最后加上编码配置

[mysql]
default
-character-set =utf8

这里的字符编码必须和/usr/share/mysql/charsets/Index.xml中一致。

2、远程连接设置

把在所有数据库的所有表的所有权限赋值给位于所有IP地址的root用户。

mysql> grant all privileges on *.* to [email protected]%identified by password‘;

如果是新用户而不是root,则要先新建用户

mysql>create user username@% identified by password;

此时就可以进行远程连接了。

 

本文作者starof,因知识本身在变化,作者也在不断学习成长,文章内容也不定时更新,为避免误导读者,方便追根溯源,请诸位转载注明出处:http://www.cnblogs.com/starof/p/4680083.html有问题欢迎与我讨论,共同进步。

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