安装环境:CentOS7 64位,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/
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4
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# 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
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检查mysql源是否安装成功
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shell> yum repolist enabled |
grep
"mysql.*-community.*"
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2、安装MySQL
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shell> yum
install
mysql-community-server
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3、启动MySQL服务
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shell> systemctl start mysqld
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查看MySQL的启动状态
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shell> systemctl status mysqld
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4、开机启动
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shell> systemctl
enable
mysqld
shell> systemctl daemon-reload
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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:
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shell>
grep
'temporary password'
/var/log/mysqld
.log
|
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shell> mysql -uroot -pmysql> ALTER USER
'root'
@
'localhost'
IDENTIFIED BY
'MyNewPass4!'
;
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或者
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mysql>
set
password
for
'root'
@
'localhost'
=password(
'MyNewPass4!'
);
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注意:mysql5.7默认安装了密码安全检查插件(validate_password),默认密码检查策略要求密码必须包含:大小写字母、数字和特殊符号,并且长度不能少于8位。否则会提示ERROR 1819 (HY000): Your password does not satisfy the current policy requirements错误,如下图所示:
通过msyql环境变量可以查看密码策略的相关信息:
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mysql> show variables like
'%password%'
;
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validate_password_policy:密码策略,默认为MEDIUM策略 validate_password_dictionary_file:密码策略文件,策略为STRONG才需要 validate_password_length:密码最少长度 validate_password_mixed_case_count:大小写字符长度,至少1个 validate_password_number_count :数字至少1个 validate_password_special_char_count:特殊字符至少1个 上述参数是默认策略MEDIUM的密码检查规则。
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
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# 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
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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:
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validate_password = off
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重新启动mysql服务使配置生效:
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systemctl restart mysqld
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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:
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mysql> GRANT ALL PRIVILEGES ON *.* TO
'USERNAME'
@
'%'
IDENTIFIED BY
'PWD'
WITH GRANT OPTION;
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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:
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[client]
default-character-
set
=utf8
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然后重新启动mysql服务即可。
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
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原文链接:http://blog.csdn.net/xyang81/article/details/51759200
本文转自 羽丰1995 51CTO博客,原文链接:http://blog.51cto.com/13683137989/1932239