原文链接:http://blog.csdn.net/xyang81/article/details/51759200
安装环境:CentOS7 64位 MINI版,安装MySQL5.7
1、配置YUM源
在MySQL官网中下载YUM源rpm安装包:http://dev.mysql.com/downloads/repo/yum/
下载mysql源安装包shell> wget http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm# 安装mysql源shell> yum localinstall mysql57-community-release-el7-8.noarch.rpm
检查mysql源是否安装成功
<pre>shell> yum repolist enabled | grep "mysql.-community."</pre>
看到上图所示表示安装成功
2、安装MySQL
<pre>shell> yum install mysql-community-server</pre>
3、启动MySQL服务
<pre>shell> systemctl start mysqld</pre>
查看MySQL的启动状态
<pre>shell> systemctl status mysqld</pre>
<pre> mysqld.service - MySQL Server Loaded: loaded (/usr/lib/systemd/system/mysqld.service; disabled; vendor preset: disabled) Active: active (running) since 五 2016-06-24 04:37:37 CST; 35min ago Main PID: 2888 (mysqld) CGroup: /system.slice/mysqld.service └─2888 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid6月 24 04:37:36 localhost.localdomain systemd[1]: Starting MySQL Server...6月 24 04:37:37 localhost.localdomain systemd[1]: Started MySQL Server.</pre>
4、开机启动
<pre>shell> systemctl enable mysqld
shell> systemctl daemon-reload</pre>
5、修改root默认密码
mysql安装完成之后,在/var/log/mysqld.log文件中给root生成了一个默认密码。通过下面的方式找到root默认密码,然后登录mysql进行修改:
<pre>shell> grep 'temporary password' /var/log/mysqld.log</pre>
<pre>shell> mysql -uroot -pmysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass4!';
</pre>
或者<pre>
mysql> set password for 'root'@'localhost'=password('MyNewPass4!');</pre>
通过msyql环境变量可以查看密码策略的相关信息:
mysql> show variables like '%password%';
共有以下几种密码策略:
策略
检查规则
0 or LOW
Length
1 or MEDIUM
Length; numeric, lowercase/uppercase, and special characters
2 or STRONG
Length; numeric, lowercase/uppercase, and special characters; dictionary file
MySQL官网密码策略详细说明:http://dev.mysql.com/doc/refman/5.7/en/validate-password-options-variables.html#sysvar_validate_password_policy
修改密码策略
在/etc/my.cnf文件添加validate_password_policy配置,指定密码策略
选择0(LOW),1(MEDIUM),2(STRONG)其中一种,选择2需要提供密码字典文件validate_password_policy=0
如果不需要密码策略,添加my.cnf文件中添加如下配置禁用即可:
<pre>validate_password = off</pre>
重新启动mysql服务使配置生效:
<pre>systemctl restart mysqld</pre>
6、添加远程登录用户
默认只允许root帐户在本地登录,如果要在其它机器上连接mysql,必须修改root允许远程连接,或者添加一个允许远程连接的帐户,为了安全起见,我添加一个新的帐户:
<pre>mysql> GRANT ALL PRIVILEGES ON . TO 'yangxin'@'%' IDENTIFIED BY 'Yangxin0917!' WITH GRANT OPTION;</pre>
7、配置默认编码为utf8
修改/etc/my.cnf配置文件,在[mysqld]下添加编码配置,如下所示:
<pre>
[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'</pre>
重新启动mysql服务,查看数据库默认编码如下所示:
默认配置文件路径: 配置文件:/etc/my.cnf 日志文件:/var/log//var/log/mysqld.log 服务启动脚本:/usr/lib/systemd/system/mysqld.service socket文件:/var/run/mysqld/mysqld.pid