Centos7安装和配置Mysql5.7

1.下载和安装mysql源

先下载 mysql源安装包

[root@localhost ~]# wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm

-bash: wget: 未找到命令

yum -y install wget //先安装下wget
wget https://dev.mysql.com/get/mysql57-community-release-el7-11.noarch.rpm //然后执行
yum -y localinstall mysql57-community-release-el7-11.noarch.rpm //安装mysql源

2.在线安装Mysql

[root@localhost ~]# yum -y install mysql-community-server

下载的东西比较多 要稍微等会；

3.启动Mysql服务，设置开机启动

[root@localhost ~]# systemctl start mysqld
[root@localhost ~]# systemctl enable mysqld
[root@localhost ~]# systemctl daemon-reload

4.修改root本地登录密码

mysql安装完成之后，在/var/log/mysqld.log文件中给root生成了一个临时的默认密码。

[root@localhost ~]# vi /var/log/mysqld.log

这里的临时密码 eMV.R#mWe3ha

[root@localhost ~]# mysql -u root -p
Enter password:

输入临时密码 进入mysql命令行；
mysql> ALTER USER ‘root’@‘localhost’ IDENTIFIED BY ‘xxxxx’;
Query OK, 0 rows affected (0.00 sec)
修改密码为 Caofeng2012@ (备注 mysql5.7默认密码策略要求密码必须是大小写字母数字特殊字母的组合，至少8位)

5.设置允许远程登录

Mysql默认不允许远程登录，我们需要设置下，并且防火墙开放3306端口；
mysql> GRANT ALL PRIVILEGES ON . TO ‘root’@’%’ IDENTIFIED BY ‘xxxxx’ WITH GRANT OPTION;
Query OK, 0 rows affected, 1 warning (0.01 sec)
mysql> exit;
Bye
退出下；

[root@localhost ~]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
success
[root@localhost ~]# firewall-cmd --reload
success

6.连接