一步一步教你centos7.3安装mysql5.7

1,到http://dev.mysql.com/downloads/repo/yum/下载yum源

wget https://repo.mysql.com//mysql57-community-release-el7-11.noarch.rpm

2,安装yum源,替换系统默认的mysql源

yum localinstall mysql57-community-release-el7-11.noarch.rpm

3,验证mysql源是否添加成功

yum repolist enabled | grep "mysql.*-community.*"

4,查看所有mysql的发行版本列表

yum repolist all | grep mysql

5,禁用5.7,安装5.6执行如下命令

yum-config-manager --disable mysql57-community
yum-config-manager --enable mysql56-community

6,步骤5也可以编辑/etc/yum.repos.d/mysql-community.repo文件,达到启用禁用

    默认5.7的文件
        [mysql57-community]
        name=MySQL 5.7 Community Server
        baseurl=http://repo.mysql.com/yum/mysql-5.7-community/el/6/$basearch/
        enabled=1
        gpgcheck=1
        gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql
    修改成5.6的
        # Enable to use MySQL 5.6
        [mysql56-community]
        name=MySQL 5.6 Community Server
        baseurl=http://repo.mysql.com/yum/mysql-5.6-community/el/6/$basearch/
        enabled=1
        gpgcheck=1
        gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

最后执行repolist enabled | grep mysql是修改生效

7,安装mysql

yum install mysql-community-server
注意:同时也安装了mysql-community-client,mysql-community-common,mysql-community-libs这三个组件

8,启动mysql服务

service mysqld start

9,检查mysql服务状态

service mysqld status

10,mysql初始化时会生成一个临时密码(Pr,KL=?ab7y/),密码为

grep 'temporary password' /var/log/mysqld.log

11,修改密码

ALTER USER 'root'@'localhost' IDENTIFIED BY 'RestyleTest@2017';
注意:密码要包含一个大写字符,一个小写字符,数字,特殊字符,不少于8位.

12,授权root用户可以远程登录访问

GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '新的密码' WITH GRANT OPTION;
FLUSH PRIVILEGES;

13,查看默认编码

show variables like '%character%';

14,配置默认编码为utf8

vi /etc/my.cnf
[mysqld]
character_set_server=utf8
init_connect='SET NAMES utf8'

15,重启mysql服务

systemctl restart mysqld

16,关闭防火墙或禁用防火墙对3306端口的拦截

vi /etc/sysconfig/iptables
-A INPUT -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
service iptables restart